描述
TIBUKKYO台灣德榕藏品｜原礦天然綠黝簾石手珠 12mm｜Zoisite stone
◎可以直接寄送港澳/新馬
◎台北市歡迎面交自取，來信客製化設計
【該組手圍是16cm】
◎黝簾石有多種顏色如藍色、紫羅蘭色、綠色、褐色、粉紅色、黃色、灰色或無色。也有半透明狀，其中以深色者的色性較強。坦桑石也稱黝簾石（saualpite，Zoisite），為矽酸鹽礦物。早期被用作裝飾材料，自1967年在坦桑尼亞發現了藍紫色的透明晶體之後，它在寶石業中的地位日益提高。為紀念當時新成立的坦桑尼亞共和國，被命名為坦桑石（Tanzanite）,它在國外還被稱為丹泉石。其中最貴的顏色如坦桑藍，常用作珍貴珠寶的原石。
Description：
Zoisite, also known as saualpite after its type locale, is a calcium aluminum hydroxy sorosilicate mineral that belongs to the epidote group. Ca2Al3(SiO4)(Si2O7)O is its chemical formula (OH). Zoisite is found in metamorphic and pegmatitic rock as prismatic, orthorhombic (2/m 2/m 2/m) crystals or in massive form. Colors of zoisite include blue through violet, green, brown, pink, yellow, gray, and colorless.
Tanzanite is the term given to blue crystals. It has a vitreous luster and an irregular to conchoidal fracture. When zoisite crystals are euhedral, they are striated parallel to the major axis (c-axis). One direction of complete cleavage is also parallel to the primary axis. The material has a Mohs hardness of 6 to 7, and its specific gravity ranges from 3.10 to 3.38, depending on the mineral.
