Footnotes

Accompanied by a GRS report stating that the natural demantoid garnet is 'Green with dispersion colours of Orange, Red and Blue', has no indications of thermal treatment and originates from Ural (Russia). Report number GRS2016-070130, dated 15 July 2016.

3.88克拉天然無經加熱處理烏拉爾(俄羅斯)翠榴石配尖晶石及鑽石戒指
鑽石共重約4.70克拉,戒指尺寸6¾,附GRS證書

Demantoid garnets are highly acclaimed members of the andradite family and are considered to be the noblest among the garnet family. Demantoid garnets were first discovered in the Russian Ural Mountains in the 1850's along the shores of the Bobrovka River, but were identified at the time as peridot.
A Finnish mineralogist, Nils von Nordensheld, later declared the gems were in fact a new mineral, and he spoke before the St. Petersburg Mineralogical Society in February 1864, pronouncing the new discovery of rich green hue to be an andradite variety of garnet. Due to its high refractive index and dispersive powers, similar to that of a diamond, the new found mineral earned its name, Demantoid (diamond-like). Of particular note, the horsetail inclusion found only in Russian demantoid garnet, is a unique and highly desirable clarity characteristic.
The mines in the Ural mountains were nearly exhausted by 1905, and by 1917 the onset of the Revolutionary War in Russia resulted in the near-end of demantoid garnet production. Thereafter, most gems were found in the Bobrovka River in the 1970s and 1980s.
Admired as the most distinguished of gemstones, Demantoid garnets were frequently used in delicate works by master Russian jeweller, Peter Carl Faberge, and often used to great effect in Art Nouveau and Art Deco jewels by Tiffany and Co.
Most demantoid garnets are less than 1 carat, however there are rare, larger exceptions. Today, Russian demantoid garnets are considered a rare gemstone which is treasures by collectors.

俄羅斯翠榴石 (demantoid garnet)是鈣鐵石榴石(Andradite garnet) 家族受到高度讚譽的成員，被認為是石榴石家族中最高貴的。它們在19世紀中期於Bobrovka沿岸的俄羅斯烏拉爾山脈初被發現，但當時被認定為橄欖石。
芬蘭的礦物學家Nils von Nordensheld後來宣稱這些寶石實際上是一種新的礦物。他於1864年2月在聖彼得堡礦物學協會發表演講，將擁有濃艷綠色色調的新礦物稱為鈣鐵石榴石。由於像鑽石段具有高折射率及色散度，這新發現的礦物被稱為demantoid（像鑽石般）。很值得注意的是，僅於俄羅斯翠榴石中才見到的馬尾狀內含物，是既獨特且非常理想的淨度特質。
俄羅斯的翠榴石礦場在1905年幾乎耗盡，到了1917年，俄羅斯革命戰爭的爆發更使得翠榴石的生產近乎停頓。在70年代和80年代間，大多數的翠榴石都在Bobrovka河發現。
被視為在眾多寶石中最優越稀有的其中之一，翠榴石當時經常被用於俄羅斯皇家珠寶商Peter Carl Faberge的精美作品中；也常被應用於蒂芙尼新藝術風格和裝飾藝術時期作品裏。
大多數翠榴石極為细小，大於1克拉的極其稀有。今天，俄羅斯翠榴石被視為是寶石收藏家罕有的珍寶。