Tanzanite
Tanzanite lu00e0 mu1ed9t thu00e0nh viu00ean cu1ee7a gia u0111u00ecnh zoisite, mu1ed9t khou00e1ng chu1ea5t silicat nhu00f4m canxi cu00f3 u0111u1ed9 cu1ee9ng tu1eeb 6,5 u0111u1ebfn 7. Tu00ean gu1ecdi tanzanit u0111u01b0u1ee3c xuu1ea5t phu00e1t tu1eeb quu1ed1c gia u0110u00f4ng Phi Tanzania. Lou1ea1i cu00f3 chu1ea5t lu01b0u1ee3ng cao thu01b0u1eddng cu00f3 mu00e0u lam saphire hou1eb7c nu01b0u1edbc biu1ec3n u0111u1eadm pha u00edt mu00e0u tu00edm ametit. u0110u00f4i khi ta gu1eb7p tanzanite du1ea1ng mu1eaft mu00e8o. Hu1ec7 tinh thu1ec3 cu1ee7a nu00f3 lu00e0 tru1ef1c giao, vu00e0 nu00f3 hu00ecnh thu00e0nh cu00e1c tinh thu1ec3 hu00ecnh lu0103ng tru1ee5, thu01b0u1eddng cu00f3 vu00e2n. Tanzanite cu00f3 mu00e0u su1eafc dao u0111u1ed9ng tu1eeb xanh du01b0u01a1ng u0111u1ebfn xanh tu00edm, mu1eb7c du00f9 mu1ed9t su1ed1 tinh thu1ec3 u0111u01b0u1ee3c tu00ecm thu1ea5y cu00f3 mu00e0u vu00e0ng u0111u1ebfn vu00e0ng nu00e2u. Khi u0111u01b0u1ee3c lu00e0m nu00f3ng u0111u1ebfn khou1ea3ng 900 u0111u1ed9 F, cu00e1c tinh thu1ec3 cu00f3 tu00f4ng mu00e0u vu00e0ng chuyu1ec3n sang mu00e0u xanh lam hou1eb7c xanh tu00edm. Tanzania u0111u01b0u1ee3c phu00e1t hiu1ec7n lu1ea7n u0111u1ea7u tiu00ean vu00e0o nu0103m 1967 tu1ea1i Tanzania, Chu00e2u Phi. Cu00e1i tu00ean Tanzania, cu00f3 nguu1ed3n gu1ed1c tu1eeb quu1ed1c gia nu01a1i tu00ecm thu1ea5y viu00ean u0111u00e1, u0111u01b0u1ee3c giu1edbi thiu1ec7u bu1edfi Tiffany vu00e0 Co., thu1ee3 kim hou00e0n u1edf New York. Tanzanite u0111u00e3 tru1edf thu00e0nh cu00e1i tu00ean u0111u01b0u1ee3c chu1ea5p nhu1eadn tru00ean tou00e0n thu1ebf giu1edbi, mu1eb7c du00f9 cu00e1c nhu00e0 khoa hu1ecdc gu1ecdi nu00f3 lu00e0 Zoisite Mu00e0u Xanh.
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