gemstone

Luminiferous gem is the man made modern night shining jewel developed with modern technology by research workers and caused strong echo in gemstone circle.

发光宝是近期由我国的学工作者依靠现代学技术研制出的“现代夜明珠”,宝界引起强烈反。

When cutting most pleochroic gemstones (Iolite, Tanzanite, Kunzite etc.), lapidaries typically try to minimize the pleochroism and maximize the single most prominent color.

割大多数的多向色性类宝时（如堇青、坦桑宝、紫锂辉等），通常宝匠会尽量缩小多向色性并最大化地将某一主色凸显出来。