The blue color produced by irradiation and subsequent heat treatment is stable to light. Currently, no routine gemological tests are available that can definitively determine whether the color of the ...

The color the trade calls imperial topaz is highly prized and very rare. Many dealers insist that a stone must show a reddish pleochroic color to be called imperial topaz. The reddish pleochroic color ...

4℃(ヨンドシー)の2021年クリスマスジュエリーが、2021年10月15日(金)より、全国4℃店舗にて先行予約を受け付け。商品引渡しは、12月11日(土)より ...

ブルーのグラデーションカラーが爽やかなY字ネックレス ... Necklace set / CZ / Topaz /Synthetic Stone 19,800円 さらに、カナル 4℃で人気のモチーフに、青い ...

The exhibit explores the full color spectrum of topaz ... As visitors explore "Topaz: A Spectrum in Stone," they are treated ...