Ko te staurolite he mīhini silicate e whai ana i te rino me te alumini, ā, ka hangaia matua i te wā o te metamorphosis o ngā kōhatu sedimentary e nui ana te kirihou, otirā ko te shale me ētahi atu kōhatu aluminous. Ko tōna hanganga matū, tōna hanganga kristal, me tōna āhua motuhake i ngā taiao metamorphic, e wehe ana i a ia i ētahi atu mīhini silicate. He nui ngā kristal o te staurolite e kitea ana hei waikura-kikorangi, waikura-kākāriki rānei, e whai ana i te āhua prismatic, ā, ka puta kotahi, ka rānei he rōpū kristal e piri tahi ana. Ko tētahi o ōna āhuatanga e mōhiotia ana rawa atu ko te hanganga o ngā tuakana whakarite, arā, e rua ngā tangata kristal e tūtaki ana i ngā koki motuhake, he nui te 60, te 90 rānei ngā nekehanga. Heoi, kāore ngā kristal katoa o te staurolite e whakaatu i tēnei āhua, ā, he maha ngā tauira e puta mai hei kristal takitahi e whakaputaina ana ki roto i te schist, i te gneiss rānei. He nui te hononga o te staurolite ki te garnet, ki te kyanite, ki te quartz, ki te muscovite, ki te biotite hoki, e ai ki te hanganga o te kōhatu māngai, me ngā āhuatanga i hangaia ai te metamorphosis. He mea nui te staurolite ki te petrology metamorphic nā te mea ko tōna hanganga me tōna oranga e hāngai ana ki ngā kohinga motuhake o te pāmahana, te pehanga, me te hanganga matū. Nā konei, ka whakamahia te staurolite ki te rangahau o ngā kohinga mīhini metamorphic me ngā tukanga geological e huri ana i ngā kōhatu sedimentary hei kōhatu metamorphic. I tua atu i ōna tono pūtaiao, ka kohia te staurolite hei tauira mīhini, ina whakaatu ia i ngā āhua kristal pai, i ngā tuakana whakarite rānei. Nō reira, kei te tahi tonu te hononga o tōna āhua tinana me tōna tikanga geological ki ōna āhuatanga crystallographic me ngā āhuatanga o tōna hanganga.
Ko te Hanganga Matū me te Āhua Kirihi o Staurolite
Ko te staurolite he mīhini silikate uaua, e kaha ana ki te rino me te aluminiūme, ā, kei roto ko te hāora, te hauwai, me ngā wāhanga rerekē o ētahi atu huānga. Ko te tātai matū whakaahuatanga e kīia ana he Fe²⁺₂Al₉Si₄O₂₃(OH), ahakoa ka rerekē ngā whakaaturanga tātai i ngā puka tuhituhi mīhini nā te hanganga tauira me te tikanga whakaatu i ngā whakawhitinga huānga. He wāhanga nui te rino i roto i te staurolite noa, engari ka taea e te magnesium te whakakapi i tētahi wāhanga o te rino i roto i te hanganga kirihou. Ka kitea hoki ngā wāhanga iti o te zinc, te manganese, te cobalt, te lithium, me ētahi atu huānga i ngā tauira māori. Ko te ōwehenga o ēnei huānga ka whakatauria e te hanganga matū o te kohatu taketake, ngā āhuatanga o te metamorphism, me te kohinga mīhini e hangaia ai te staurolite. Ka pāngia e ēnei whakawhitinga tōna tae, ōna āhuatanga optika, tōna kiato, me ētahi atu āhuatanga ka ineina. Kei ngā tūnga hanganga maha te aluminiūme, ā, kei ngā tetrahedra silikate te silicon, e wāwāhi ana i te hanganga atomu torotoro o te mīhini. Ko ngā rōpū hydroxyl hoki e uru ana ki te hanganga, e wehe ana i te staurolite i ngā mīhini silikate kāore he wai, ahakoa he ōrite ngā huānga.
Ka whakaputa te staurolite i ngā kōhure o te pūnaha kōhure monoclinic, ahakoa ka taea te kite i tōna hanga kristalotiko e tata ana ki te orthorhombic nā te mea kei te tata ki te 90 ngā wāhi o tētahi o ōna koki waenganui-aho. Ko tōna hanga he kohinga o ngā polyhedra e hono ana, e whai ana i te konutai me te rino, me ngā tetrahedra silicate, e whakaritea ana ki roto i tētahi hanganga uaua. Ka pā tēnei whakaritenga ki te āhua kōhure motuhake o te mīhini, ki te wehe, ki te mahi aho, me ngā āhuatanga mekanika. He nui ngā kōhure takitahi e whanake ana ki ngā āhua prismatic roa, me ngā mata e tino mārama ana, ahakoa ka taea te huri o ēnei āhua ina kore e taea te tipu nā te kaha o ngā mīhini kei te taha. Ko te twinning he āhuatanga kristalotiko nui o te staurolite, ā, ka puta ina whanake ngā kōhure takitahi i tētahi āhua whakatauritea, whakamātau i runga i te tūnga o ia kōhure. I runga i te hononga twinning, ka taea te whakawhitiwhiti o ngā kōhure takitahi i te 60, 90 rānei ngā wāhi, e whakaputa ana i ngā āhua rite ki te rārangi e mōhiotia ana e te mīhini. Ko ēnei hanganga he hua o ngā hononga kristalotiko, ehara i te hononga tinana noa o ngā kōhure kāore e hono. Ahakoa tērā, ehara te twinning i te mea e kitea ana i ngā katoa, ā, ko te āhua o tētahi tauira ka whakawhirinaki ki ngā āhuatanga tipu, ki te wāhi e wātea ana, me te hītori geolohia i muri mai. He nui te hononga i waenganui i te hanga matū me te hanga kristalotiko hei mārama ai te mīhini, tōna rerekētanga i ngā taiao geolohia, me tōna whakamahinga i ngā rangahau mō ngā kōhure metamorphic.
Te Hanga me te Wāhi Pūtaiao o te Staurolite
Kaupapa matua o te hanganga o te staurolite ko te metamorphosis ā-rohe o ngā pūtake whakaputa i te hiriwa, otirā ko te shale, ko te mudstone, me ētahi atu pūtake iti-kiato i puta mai i ngā kohatu kōhatu nui. I te wā o te metamorphosis, ka whakamatauria ēnei pūtake ki ngā pāmahana me ngā pēhanga teitei nā te tārewa, te whakanoho o te papa whenua, me te whakarerekētanga tectonic. Ka kore e taea te noho tonu o ō rātou minera taketake, ā, ka whakawhiti hei hanganga minera hou e whakaatu ana i ngā āhuatanga ahupūngao me ngā āhuatanga matū e huri ana. He nui te kitea o te staurolite i ngā wāhanga waenganui o te metamorphosis ā-rohe, otirā i raro i ngā āhuatanga e pā ana ki ngā wāhanga o te facies amphibolite. Ko tōna hanganga kāore e whakawhirinaki anake ki te pāmahana me te pēhanga, engari hoki ki te matū katoa o te pūtake, otirā ki te wātea o te hiriwa, te rino, te magnesium, me ētahi atu huānga. Ka taea hoki e ngā waiwai whai wai te pānga ki ngā whakawhitinga minera me te neke o ngā huānga matū i roto i te pūtake. Ina haere tonu te metamorphosis, ka tipu te staurolite hei kirihou takitahi i roto i tētahi mata iti-kiato, ka taea hoki te whakauru ki ngā pūtake metamorphic nui-kiato. Ka taea te tohu tōna noho i tētahi awhe o ngā āhuatanga metamorphic, ahakoa he rerekē ngā āhuatanga tūturu i hangaia ai mēnā he rerekē te matū o te pūtake me ngā minera kei reira. Nō reira, he nui te whakaaro ko te staurolite he wāhanga o tētahi hanganga minera whānui, kaua hei tohu motuhake mō tētahi uara pāmahana, pēhanga kotahi.
Ko te staurolite ka kitea nuitia i roto i te mica schist me te gneiss, kei reira e noho tahi ana ki ētahi mīhini pērā i te garnet, kyanite, quartz, muscovite, me te biotite. E whakaatu ana ēnei mīhini hono i te hanganga matū o te kohatu taketake me ngā āhuatanga metamorphic i pa ki a ia i roto i tōna hītori ā-ao. I roto i ngā kohatu e wātea ana te alumina, ka taea te tipu o te staurolite me te garnet i runga i te metamorphism haere tonu, engari mā ngā huringa o te pāmahana, te pehanga rānei, me te hanganga matū, ka taea te whai wāhi ki ngā whakamahunga ka kai i te staurolite me te hanga i ētahi atu mīhini. Nō reira, ko tōna pūmautanga e herea ana ki ngā āhuatanga motuhake, kaua ki te awhe katoa o ngā taiao metamorphic. Ka āwhina ngā hononga i waenganui i te staurolite me ngā mīhini tata ki te ārahi i ngā geologist kia tautohu i ngā rohe metamorphic, kia whakahoki anō i te raupapa o ngā whakamahunga hanga mīhini, me te whakamārama i te whanaketanga o ngā rangi maunga. I ētahi kohatu, ka tohatoha ōrite ngā kirihou ki te matrix katoa; i ētahi atu, ka puta hei porphyroblasts takitahi e nui ake ana i ngā kirikiri mīhini kei te taha. Ko tōnā rahi me tōnā āhua e whakawhirinaki ana ki ngā mea pērā i te roa o te metamorphism, te tere o te tipu kirihou, te wāhitanga o ngā wāhanga matū, me te wāhi e wātea ana i roto i te kohatu. Ka taea hoki te tiaki i te staurolite i roto i tētahi kohatu metamorphic e whakaatu ana i te hītori whakamātao me te deformations muri, ina koa kāore ngā tukanga ā-ao muri i te whakarerekē katoa i te kohinga mīhini taketake.
Ngā āhuatanga ā-tinana me ngā āhuatanga matū o te staurolite
Ka kitea noa te staurolite i ngā tae o te kākāriki-kōwhai, te kōwhai-pango, te pango-tīkahu, me te pango rawa, ā, ka pāngia tōna tae e te nui o te rino me ētahi atu whakawhitinga matū. He prismatic ngā kristo, he ōrite ngā mata roa, ka kitea he striations, he hēhē rānei i hangaia e ngā āhuatanga tupu me ngā pāhekoheko ki ngā mīhini kei te taiao. Ko te luster he vitreous ki te resinous, ko te streak he mā ki te mā-kākāriki. Ka rerekē te staurolite mai i te transparent ki te translucent, ki te opaque rānei, i runga i te thicknes o te kristo, ngā inclusions, ngā fractures, me te hanganga o roto. He nui ake te refractive indices, he pleochroism hoki, he āhuatanga optika e rerekē ana te tae i runga i te direction o te light transmission i roto i te kristo. I raro i te polarized light, ka āwhina tēnei āhuatanga ki te wehe i te staurolite i ētahi atu mīhini i ngā thin sections metamorphic. He distinct te cleavage i tētahi direction, engari ka uaua te kitea i ngā specimens he irregular surfaces, he numerous inclusions rānei. He uneven ki te subconchoidal te fracture, he brittle hoki te mīhini i runga i te mechanical stress. He 7 ki te 7.5 te Mohs hardness o te staurolite, he 3.6 ki te 3.8 te specific gravity, nā reira he harder, he denser hoki i ētahi atu silicate minerals. Ko ēnei āhuatanga ka whakaputa i tōna persistence i ngā rocks weathered, me te explain why ka ora tonu ngā grains staurolite i te transport ki ngā environments sedimentary.
Ko te staurolite, i tō āhua matū, he silicate whakawhitiwhiti e whai ana i ngā wāhanga hydroxyl, ā, ko te rino me te aluminiama ngā wāhanga matua o tōna hanganga, ahakoa ko te hiriwa me te hāora ngā wāhanga silicate o tōna hanganga kōhatu. Ka taea te whakakapi i te rino mā te magnesium, ā, ka kitea ētahi wāhanga iti o te zinc, te manganese, te cobalt, te lithium, me ētahi atu huānga, i runga i te taiao horihori. He rerekē te nui o ēnei whakakapinga i waenganui i ngā wāhi rerekē, ā, ka pāngia ai ngā āhuatanga optika me ngā āhuatanga ōkiko o te mīhini. Ko te staurolite he mea tūpato i raro i ngā āhuatanga metamorphic e hangaia ai, engari ko tōna tūturutanga e whakahaeretia ana e te pāmahana, te pehanga, te hanganga katoa o te kohatu, me te whai wāhi o ētahi atu mīhini me ngā wai. Ina huri haere ēnei āhuatanga, ka taea e ngā tukanga matū te whakamāmā i te staurolite kia hangaia ai ngā kohinga mīhini hou. Nā tōna kaha me tōna ārai ki te pōrewarewa noa, ka taea e te staurolite te noho tonu i muri i te wehe o tōna kohatu matua ki te mata o te whenua me te pōrewarewa. Engari, mā te pōrewarewa roa, te huringa matū, me te pōrewarewa mekanika, ka taea te whakarerekē, te whakakore rānei i ngā kōhatu takitahi. Ko te hononga o tōna hanganga matū, tōna āhua optika, tōna kaha, tōna taumaha, me tōna āhua kōhatu motuhake, he paerewa whai hua hei tautuhi i te staurolite me te rangahau i te hitori metamorphic o ngā kohatu kei reira ia.
Ngā momo me ngā rerekētanga o te Staurolite
Ko te staurolite he mea whakaarohia hei momo mōrearea motuhake, ehara i te mea he mōrearea e hēnei ngā rerekētanga e mōhiotia ana mā te ture. Ko ngā rerekētanga i waenganui i ngā tauira ka whakamāramahia mā te āhua o te hanganga matū, te āhua o te kristal, te tae, me te whakawhitiwhiti. Ko ngā rerekētanga i roto i te iron, magnesium, zinc, me ētahi atu huānga ka whakaatu i ngā rerekētanga o ngā taiao pūtaiao e hangaia ai te mōrearea. Ahakoa he whai take ēnei rerekētanga hanganga ki te rangahau mōreare, ko te nuinga o ngā tauira staurolite e kitea ana i ngā kohinga ka whakamāramahia hei staurolite anake, kāore e wehea ki ngā momo rerekē. Ko ngā āhua e kōrerotia ana te nuinga ko te staurolite e whai ana i te iron, ngā hanganga e whai ana i te magnesium, ngā hanganga e whai ana i te zinc, me ngā kristal e whakaatu ana i te whakawhitiwhiti cross e mōhiotia ana.
Staurolite kaha rino: Ko te staurolite kaha rino te āhua noa o te mīhini, ā, ka kitea whānuitia i roto i ngā toka metamorphic, otirā i ngā schist mica. He tōpū te karakara o ōna kirihou, he pango-kākāriki, he kākāriki-kōura rānei, he pango hoki; ka puta rānei hei kirihou takitahi, hei kirihou e hono ana ki roto i tētahi mata quartz-mica. He wāhanga matua te rino i te hanganga kirihou o te mīhini, ā, ka tautoko i te karakara motuhake me te taumaha nui ake o te mīhini. E rerekē ana te nui o te rino i runga i te āhua o te toka kaiwhakaora me ngā āhuatanga o te metamorphism.
Staurolite whai-magnesium: Ka taea e te magnesium te whakawhiti i te rino i roto i te hanganga kōhatu o te staurolite, ka hanga i ngā rerekētanga koiora e whakaatu ana i te taiao matū i hanga ai te mīhini. Ko te āhua o te whakawhitinga ka whakawhirinaki ki ngā mea pērā i te wātea o te magnesium i te kōhatu kaiwhakarato me te koiora o ngā mīhini e noho tahi ana. Kei roto tonu te staurolite whai-magnesium i te momo mīhini kotahi ina kei roto tōna koiora i te awhe e whakaaetia ana mō te staurolite. He nui ake te hiahia ki ēnei rerekētanga i roto i te koiora mīhini me ngā rangahau mō ngā tukanga metamorphic.
Staurolite eke zinc: Ka taea te kitea te zinc hei wāhanga iti, ā, i ētahi wā he nui ki te takiwā, o te staurolite, mā te whakakapi i ētahi atu huānga ki ngā wāhi hanga e tika ana. Ko te nui o te zinc ka uru ki te mīhini e whakawhirinaki ana ki tōna wātea i te wā o te tipu kōhatu, me ngā āhuatanga matū o te huainga o te taiao. He rawe ngā momo e whai zinc ana hei tātaritanga mō te whakakapinga huānga, me te tohatoha o ngā huānga iti me ngā huānga iti rawa ki waenganui i ngā mīhini metamorphic. Kāore te noho mai o te zinc e whakaatu tonu i te hungahunga mīhini rerekē; ko te wehewehenga e whakawhirinaki ana ki te hanganga o te mīhini, me te tikanga ingoa mīhini e pā ana.
Staurolite kōwhiti: Ko te staurolite kōwhiti e tohu ana ki ngā kirihou e honoa ai ētahi takitahi e rua i runga i tētahi hononga kristalorangi motuhake, ka hangaia he āhua rārangi. Ko te koki i waenganui i ngā takitahi he 60, he 90 rānei ngā nekehanga, e whakawhirinaki ana ki te momo kōwhiti. He nui ngā kirihou e piri ana ki ngā mura metamorphic, ā, he mārama ake te kitea ina he ōkawa ngā mata kristal o ngā takitahi e tūtaki ana. E whakaahua ana te kōwhiti kōwhiti i te āhua kristalorangi o te mineral, ehara i te momo matū rerekē, ā, he maha ngā tauira staurolite kāore e whai i tēnei āhuatanga.
Ngā Wāhi Nui o te Staurolite
Ka kitea te staurolite i ngā whenua metamorphic kei ētahi atu whenua, ahakoa, otirā i ngā wāhi kua pāngia ngā papa kohatu sedimentary e whai ana i te nui o te alumini, mā te metamorphism ā-rohe. Ko tōna tohatoha e hāngai pū ana ki ngā mica schists, gneisses, me ētahi atu papa metamorphic i hangaia i raro i ngā āhuatanga pēnei i te pēhanga me te pāmahana e tika ana. Ko te kounga me te āhua o ngā kristara ka rerekē i waenganui i ngā wāhi, i runga i te hanganga o te papa matua, te taumata o te metamorphism, me te wāhi e wātea ana mō te tipu o ngā kristara. Ka puta ētahi wāhi e whakaputa ana i ngā kristara prismatic motuhake, engari ko ētahi atu e whai ana i ngā korakora iti, kāore e rite te āhua, e toro noa i roto i tētahi metamorphic matrix. E mōhiotia ana ngā tauira cross-twinned mai i ētahi atu wāhi, ahakoa kāore e tino ōrite te whanaketanga o tēnei āhua i ngā kōpaki katoa.
I roto i ngā wāhi metamorphic maha o Hononga o Moutere Amerika, ka kitea te staurolite, tae atu ki ētahi wāhanga o Georgia, Virginia, me New Hampshire. He hononga motuhake a Georgia ki ngā kirikita staurolite e puta ana i ngā kōhatu metamorphic me ngā whakaputanga mata pōro e hua mai ana i tō rātou pakaru. I ētahi wāhanga, kua wehe ngā kirikita i te kōhatu taketake, ā, ka taea te kohi i te oneone, i te kōhatu rānei. Kei New Hampshire hoki ngā kōhatu metamorphic e whai staurolite ana, kei reira te minarenga e noho tahi ana me ētahi atu minarenga i hangaia i te wā o te metamorphism ā-rohe. Ka whakaatu ēnei tauira i te tikanga ka tiakina ai te staurolite, ahakoa kei roto i tōna taiao horihori taketake, ahakoa hei kirikita kua wehe i muri i te korohū.
Ko ngā wāhi kei Āhia, ka kitea i ētahi wāhanga o Huiteneiri, Ateria, Wīwī, me ētahi atu rohe kua pāngia e te metamorphism ā-rohe, tērā rānei ko te metamorphism Alpine. Kei Huiteneiri, kua whakamāramatia te staurolite ki ngā whenua metamorphic o ngā Alps, kei reira ka noho tahi ki ngā mīhini pērā i te quartz, te mica, te garnet, me te kyanite. Ka whakaatu ēnei hononga mīhini i ngā hitori uaua-pūmau o ngā toka kua pāngia e te kokiritanga whenua me te hanga maunga. Ka kitea hoki te staurolite i ngā rohe metamorphic o Rūsia, tae atu ki ētahi wāhanga o te Kola Peninsula, kei reira kua tūwhera ngā toka aluminous e hāngai ana ki te metamorphism. I tua atu i ēnei wāhi, kua whakahuatia te mīhini mai i ngā ara metamorphic katoa o te ao. Ko ngā rerekētanga i te rahi kristini, te tae, te hanganga, me te twinning i waenganui i ngā tauira, ka whakaatu i ngā āhuatanga ā-ao tuku iho ā-rohe, kaua e tohu anō he momo mīhini rerekē.
Ka taea hoki te kite i te staurolite i ngā whakaputanga tuarua o ngā kohuke sediment, e hangaia ana mā te pōturi me te korohū o ōna murae taketake. Nā tōna kaha me tōna ārahi ki te pōturi, ka taea e ngā kristi takitahi te ora i te nekehanga a ngā awa me ngā waiwhenua i mua i te tāpirihanga ki te sediment e whai ana i ētahi atu minere kaha. He rawaka whai hua ēnei momo putanga detrital mō ngā rangahau āhu whenua nā te mea ka taea e tōna koiora minere te whakarato i ngā tohu mō ngā mura e kitea ana ki runga ake rānei, kei roto rānei i te rohe puna o te sediment. Heoi, kāore te noho mai o te staurolite i te sediment e whakaatu ana i te tūnga tika o tōna hanganga taketake, ahakoa he taonga āhu whenua anō. Ka taea e ngā kairangahau te hono i te tautuhi minere ki ngā āhuatanga sediment, te āhu whenua rohe, me te koiora o ngā kirikiri e pātata ana hei tirotiro i te puna me te hitori nekehanga o ēnei whakaputanga.
Whakamahinga me ngā tono o te staurolite
Ko te staurolite tōna whakamahinga matua i roto i ngā rangahau mīneropiko, te ako pūtaiao whenui, me te kohikohi mīnera. Nā tōna nohoanga i roto i ngā huinga mīnera metamorphic, me ōna hononga ki ētahi atu mīnera pērā i te garnet, te kyanite, me te biotite, ka āhei kia whai wāhi hei tātaritanga i ngā āhuatanga i pa ki ngā huinga ina metamorphosis. Ka tirohia e ngā pūtaiao whenui te nohoanga, te hanganga, me ngā hononga ā-ahu o te staurolite hei āwhina i te whakamārama i ngā āhuatanga pēhanga me te pāmahana i pa ki tētahi huinga i roto i tōna hītori whenui. Ina whakaurua ki ngā tirohanga mō ētahi atu mīnera kei roto i te huinga kotahi, ka taea e te staurolite te tuku mōhiohio mō te taumata metamorphic, ngā tukanga hanga mīnera, me ngā huringa o te hanganga matū o ngā huinga i te wā o te recrystallization. Ka rangahauhia hoki mā te aroturuki optika, te tirotiro electron-microprobe, me ētahi atu tikanga mīneropiko hei tātaritanga i te whakakapi matū me te hanganga kirihou. I roto i te ako pūtaiao whenui, ka whakamahia ngā tauira staurolite hei whakaatu i ngā hanganga kirihou monoclinic, te twinning mīnera, me te tautuhi i ngā mīnera metamorphic. He mea nui rawa atu ngā kirihou cross-twinned hei whakaatu i te hononga i waenganui i te hanganga kristallographic me te āhua kanapa o te kirihou.
Kua rangahaua hoki te staurolite mō ngā whakamahinga ā-pakihi, otirā ērā e pā ana ki ngā rawa tātari me ngā tukanga whare hanga. Nā tōna kaha, tōna taumaha, me tōna mātau ki te pakaru o te āhuarangi, he wāhanga pea o ētahi hua ā-pakihi e whai wāhi ai ngā mineral. Heoi, ka whakawhirinaki tōna tika ā-pakihi ki ngā āhuatanga pērā i te rahi o ngā korakora, te marie matū, ngā utu tukatuka, me te wātea o ngā rawa kē atu. I roto i te tukatuka mineral-kōhatu, ka taea te kohikohi i te staurolite hei wāhanga o te kōhatu mineral taumaha, kaua ko te mineral matua e rapua ana. Ko tōna whakamahinga i ngā tukanga whare hanga ka whakawhirinaki ki ngā āhuatanga e hiahiatia ana mō tētahi tukanga whakairoiro motuhake, tae atu ki ngā āhuatanga o ngā korakora me te mahi wera. He motuhake ake ēnei whakamahinga i ōna whakamahinga ā-geology me ā-mātauranga, ā, ka rerekē te uara ā-pakihi o te staurolite i runga i ngā rauemi ā-rohe me te hiahia ā-pakihi.
I roto i ngā marau kohikohi mīhini me te lapidary, ka whakatairangahia te staurolite nōna ngā āhua krista e mōhiotia ana, me ngā hononga rite ki te rārangi e kitea ana i ētahi wā. Ka taea te kohikohi i ngā tauira mai i ngā pūnaha metamorphic, i ngā wāhi e noho ai te mīhini i te taiao. Ko ngā krista kua whanake pai, ka tiakina tonu i roto i tōna matrix taketake hei whakaatu i tōna hononga ki te huarahi o te papa, ā, ko ngā krista wehewehe ka whakaaturia kotahi. He maha ngā rawa ka tapaina, ka whakamātauria hei whakapaipai, ahakoa kāore te mīhini e whakamahia whānuitia hei gemstone faceted. Ko tōna tae matua, ko ngā inclusion, ko ngā fracture o roto, me te limited transparency ka aukati i tōna whai hua mō te tapahi gemstone. Nō reira, he nui ake te staurolite hei tauira mīhini me te rauemi geological, i tētahi gemstone whakawhitiwhiti whānui.