Grossular 是 石榴石族中以钙和铝组成的成员 (Ca3Al2(SiO4)3),因其广泛的色域以及晶体状态的光泽而备受收藏者赞誉。颜色范围涵盖生动的祖母绿至薄荷绿(含铬/钒的“tsavorite”),暖肉桂色到蜂蜜橙色(“hessonite”),在 grossular–andradite 边界处的“Mali garnet”的黄绿/黄绿色,以及粉色、无色和罕见的棕色/琥珀色调。晶体常呈现为尖锐的十二面体和梯形十二面体——常具有明亮、玻璃状的光泽——并出现在接触变质的矽卡岩和钙-硅酸岩中,典型的伴生矿物包括 diopside、clinochlore、vesuvianite、wollastonite 和 calcite。
Grossular 在收藏领域占有独特地位,因为它连接了展览标本与宝石世界。Tsavorite 长久以来在珠宝中备受珍视,也以出色的晶体让矿物收藏者欣喜——干净、饱和的绿色始终是观赏焦点。来自阿尔卑斯的经典 hessonite 的温暖光辉与内部的“涡旋”自18世纪至19世纪以来就迷惑着收藏家。与此同时,来自马里的现代发现以其独特的黄绿/黄绿色调和出色的晶形重新点燃了兴趣。供应范围从大量的小 Jeffrey Mine 绿晶和广泛分布的 hessonites,到稀缺的高端 tsavorite 带基质标本(大多数宝石级晶体已被切割)。与许多矽卡岩矿物一样,开采时断时续,且常常是工业作业的副产物,因此供应可能会出现意外变化。这种组合——历史经典、现代高光与丰富的色彩——使Grossular长期保持高人气,具备易于入门的入口点以及真正的顶级收藏品。
The legendary Jeffrey Mine (Asbestos, Québec) produced some of the most iconic green grossulars ever found. Typically small but razor-sharp crystals from translucent to gemmy apple-green grew in dense clusters on pale diopside or serpentine-rich skarn, often with dramatic color contrast and a glassy luster. Crystals are usually dodecahedral/trapezohedral, sometimes with frosted or slightly etched faces that sparkle in cabinet lights. The mining era that yielded these pockets has ended; fine, undamaged clusters—especially those with exceptional luster, uniform color, and balanced compositions—are now connoisseur targets.
Merelani 因 Tanzanite 而著名,但它也产出极佳的 tsavorite grossular。 These crystals, colored by vanadium and chromium, range from vivid emerald to neon green, commonly as sharp, highly lustrous dodecahedra and combinations. Many are gem-clear single crystals; true, stable matrix pieces are unusual because the host graphite schists are crumbly. The finest examples show saturated, even color, water-like clarity, and crisp, reflective faces—specimens that can compete aesthetically with the best green minerals from anywhere.
Val d’Ala in Piedmont is the archetype for classic hessonite: warm cinnamon to honey-orange grossular crystals on green diopside or silky clinochlore. These timeless Alpine pieces often show the characteristic “treacle” or roiled internal texture, with gemmy edges, sharp forms, and exquisite color contrast. Larger, cleanly terminated crystals on aesthetic matrix are old-European classics that anchor many garnet suites.
颜色:
清晰度与光泽:
晶体形态:
大小与美观:
状态:
来源:
修复:
抛光:
清洁/蚀刻:
处理:
处理:
光线与温度:
清洁:
用温水加入一滴温和洗碗液及软毛刷清洗;冲洗后拍干。避免超声波/蒸汽清洗,因为可能损坏晶体或松动修复。
小心使用酸性清洁剂或“除锈剂”——赭辉石可耐受,但相关的方解石、透辉石或叶绿云母可能不耐受。如有需要,请局部温和测试后再清洁。
存储:
随着其丰富的色彩、优雅的晶体学,以及跨越数世纪的经典产地,赭辉石提供一生的收藏追求——从价格亲民、带有宝石般光泽的缩略标本,到定义收藏的博物馆级经典之作。