回復に向かうダイヤモンド市場、高級品オークションの結果
世界の二大ダイヤモンド生産企業は、この数ヶ月間で原石の売上げが激減したものの、現在の市場は安定していると報告しています。Christie’s（クリスティ―ズ）とSotheby’s（サザビーズ）のオークションの落札結果を発表します。
Diamond Market in Recovery, Top-end Auction Results
World’s two largest diamond producers say market is stabilizing after severe cutbacks in rough sales.
Gems & Gemology Fall 2019 Issue Showcases Gem Art of the Taj Mahal
CARLSBAD, Calif. – Nov. 18, 2019 – Combining the science and beauty of gemstones, the Fall 2019 Gems & Gemology (G&G) is full of dazzling imagery and detailed research.
アリゾナ州ロードトリップ：ワイルドウエストから誕生した宝石と鉱物の産地
アリゾナの風光明媚な砂漠と山の風景は、宝石や鉱物の宝物を探し求めて旅する近代的なワイルドウエストのロードトリップに完璧な背景画となります。
Faceted Diamond Octahedron with a Remarkable Stellate Cloud Inclusion
A remarkable inclusion scene in diamond is showcased by an unconventional cutting style.
Resin Imitation Ivory with a Pseudo “Engine-Turned” Structure
Resin materials marketed as imitation ivory were recently acquired by a GIA gemologist.
Laboratory-Grown Sapphire with Unusual Features
The Hong Kong laboratory recently examined a 14.36 ct pink-orange cushion mixed-cut specimen.
Possible Natural Abalone Shell Blister
An intriguing item was sent by KC Bell to GIA’s Carlsbad laboratory for examination.
Cobalt-Coated Sapphire
The New York lab recently identified a sapphire entirely covered with a cobalt coating to enhance its blue color.
Large Laboratory-Grown Star Ruby and Sapphire
The Tokyo lab received two unusually large laboratory-grown star corundum for examination.
Quarterly Crystal: “Ball Bearing” in Quartz
Quartz crystals with three-phase fluid inclusions from the Jinkouhe mine in the Sichuan Province of China have been sold for many years at gem and mineral shows such as those held annually in Tucson, Arizona.
Iolite-Sunstone Intergrowth and Inclusions
At the GIA Carlsbad laboratory, the authors recently examined a cabochon of “bloodshot” iolite (containing red, eye-visible platelets of hematite) intergrown with a sunstone.
The Rare Sun Diamond
An eye-visible cloud with a star-like pattern is highlighted by the cut of the Rare Sun diamond.
Blue Gahnite from Nigeria
LA-ICP-MS analysis helps researchers better understand the composition of this type of spinel from Nigeria.
Gemstone Portrait Artist Angie Crabtree
The 2019 AGTA show in Tucson featured the work of a gemstone portrait artist.
Black Non-Nacreous Pearl Imitations Made of Beads Cut from Shell
The DANAT laboratory recently encountered two natural black color beads cut from an unknown mollusk.
A Near-Round Natural Pearl Discovered in the Edible Oyster Magallana bilineata
An edible oyster from the Hab River Delta of Pakistan reveals a natural pearl.
New Find of Deep Blue Aquamarine from Nasarawa State in Nigeria
Nigerian aquamarine with exceptionally deep and saturated color also displays unusually strong pleochroism.
Dendritic Inclusions of Thorianite in Heated Blue Sapphire
Recently, a 2.05 ct blue sapphire was sent to Guild Gem Laboratories for identification.
.jpg "YMAL GIA Ed")
