It was first described in 1883[6] as small, single crystals in loose granitic debris in Mt. Soktui, Nerschinsk district, Adun-Chilon Mountains, Siberia.[7] It was named after Pavel Vladimirovich Eremeev, Russian mineralogist, engineer and professor, who collected the first specimens (Jeremejev, German; 1830–1899).[4]
Jeremejevite is a mineral that shows pleochroic properties, which is an optical phenomenon in which the mineral's color appears to change depending on the angle at which it is viewed. Blue specimens from Namibia show a light cornflower blue to colorless to light yellow pleochroism, while yellow materials show light yellow to colorless pleochroism. This mineral is also piezoelectric, meaning that it would generate electricity when under mechanical stress.[7]
Mining and localitiesedit
Jeremejevite occurs as a late hydrothermal phase in graniticpegmatites in association with albite, tourmaline, quartz and rarely gypsum. It has also been reported in the Pamir Mountains of Tajikistan, Namibia and in micro-crystalline form at the Eifel district, Germany.[4] It was first found in facetable form in Namibia, which were blue-green pyramidal crystals up to 2 cm (0.79 in). Later, there was a new source revealed in Namibia, near Usakos in 2001.[7] Nowadays, most of the stones on the market are from that deposit.[5]
Jewelry industryedit
Blue jeremejevite in rare, clear crystal form. Image width: 1.5 mm (0.059 in).
As an OH-end member, scientists have been able to synthesize jeremejevite, but only in micro-crystalline form, without fluorine. This synthesized variant of the mineral has no use in the jewelry industry.
Typically, faceted gems can reach up to 5 carats, but usually they range between less than 1 carat and 2 carats. However, new sources produced much larger faceted stones, the biggest faceted gem weighing 254 carats. This gem was found in Sri Lanka in 1990.
Even though jeremejevite is a relatively durable stone, it should not be cleaned using ultrasound cleaning or steaming; the stone usually contains liquid inclusions, which could shatter the stone if cleaned using these methods. It is recommended to clean them with warm water, a mild detergent, and a soft brush instead.[7]
Due to its high value and rarity, it is considered a collectors' stone, who purchase it in mineral form, hence only a few specimens had been faceted so far.[5]
^ abc"Rare Jeremejevite Gems at AJS Gems". www.ajsgem.com. Retrieved 2022-03-08.
^Damour A. Note sur un borate d'alumine cristallisé de la Siberie. Nouvelle espèce minerale // Bulletin de la Société minéralogique de France. 1883. 6. N 1. P. 20-23.
^ abcd"Jeremejevite Value, Price, and Jewelry Information". gemsociety.org. International Gem Society. Retrieved 2022-03-07.
Wikimedia Commons has media related to Jeremejevite.
This article about a specific mineral or mineraloid is a stub. You can help Wikipedia by expanding it.
jeremejevite, aluminium, borate, mineral, with, variable, fluoride, hydroxide, ions, chemical, formula, al6b5o15, considered, rarest, thus, most, expensive, stones, nearly, century, considered, rarest, gemstones, world, better, source, needed, generalcategoryb. Jeremejevite is an aluminium borate mineral with variable fluoride and hydroxide ions Its chemical formula is Al6B5O15 F OH 3 It is considered as one of the rarest thus one of the most expensive stones For nearly a century it was considered as one of the rarest gemstones in the world 5 better source needed JeremejeviteGeneralCategoryBorate mineralFormula repeating unit Al6B5O15 F OH 3IMA symbolJer 1 Strunz classification6 AB 15Crystal systemHexagonalCrystal classDipyramidal class 6 m H M symbol 6 m Space groupP63 mIdentificationColorColorless white yellowish blue light yellow brown aquamarine blue rarely violet colourless in transmitted lightCrystal habitPrismaticCleavageNone observedFractureConchoidalMohs scale hardness6 5 7 5LusterVitreousStreakWhiteDiaphaneityTransparentSpecific gravity3 28 3 31Optical propertiesUniaxial Refractive indexnw 1 653 ne 1 640Birefringence0 0130PleochroismColorless light blue violetOther characteristicsPiezoelectricReferences 2 3 4 It was first described in 1883 6 as small single crystals in loose granitic debris in Mt Soktui Nerschinsk district Adun Chilon Mountains Siberia 7 It was named after Pavel Vladimirovich Eremeev Russian mineralogist engineer and professor who collected the first specimens Jeremejev German 1830 1899 4 Contents 1 Properties 2 Mining and localities 3 Jewelry industry 4 ReferencesProperties editJeremejevite is a mineral that shows pleochroic properties which is an optical phenomenon in which the mineral s color appears to change depending on the angle at which it is viewed Blue specimens from Namibia show a light cornflower blue to colorless to light yellow pleochroism while yellow materials show light yellow to colorless pleochroism This mineral is also piezoelectric meaning that it would generate electricity when under mechanical stress 7 Mining and localities editJeremejevite occurs as a late hydrothermal phase in granitic pegmatites in association with albite tourmaline quartz and rarely gypsum It has also been reported in the Pamir Mountains of Tajikistan Namibia and in micro crystalline form at the Eifel district Germany 4 It was first found in facetable form in Namibia which were blue green pyramidal crystals up to 2 cm 0 79 in Later there was a new source revealed in Namibia near Usakos in 2001 7 Nowadays most of the stones on the market are from that deposit 5 Jewelry industry edit nbsp Blue jeremejevite in rare clear crystal form Image width 1 5 mm 0 059 in As an OH end member scientists have been able to synthesize jeremejevite but only in micro crystalline form without fluorine This synthesized variant of the mineral has no use in the jewelry industry Typically faceted gems can reach up to 5 carats but usually they range between less than 1 carat and 2 carats However new sources produced much larger faceted stones the biggest faceted gem weighing 254 carats This gem was found in Sri Lanka in 1990 Even though jeremejevite is a relatively durable stone it should not be cleaned using ultrasound cleaning or steaming the stone usually contains liquid inclusions which could shatter the stone if cleaned using these methods It is recommended to clean them with warm water a mild detergent and a soft brush instead 7 Due to its high value and rarity it is considered a collectors stone who purchase it in mineral form hence only a few specimens had been faceted so far 5 References edit Warr L N 2021 IMA CNMNC approved mineral symbols Mineralogical Magazine 85 3 291 320 Bibcode 2021MinM 85 291W doi 10 1180 mgm 2021 43 S2CID 235729616 Jeremjevite on Mindat org Jeremejevite on Webmineral com a b c Handbook of Mineralogy a b c Rare Jeremejevite Gems at AJS Gems www ajsgem com Retrieved 2022 03 08 Damour A Note sur un borate d alumine cristallise de la Siberie Nouvelle espece minerale Bulletin de la Societe mineralogique de France 1883 6 N 1 P 20 23 a b c d Jeremejevite Value Price and Jewelry Information gemsociety org International Gem Society Retrieved 2022 03 07 nbsp Wikimedia Commons has media related to Jeremejevite nbsp This article about a specific mineral or mineraloid is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Jeremejevite amp oldid 1190753111, wikipedia, wiki, book, books, library,
