Investigation of a purple bangle identified it as a dyed marble imitation of sugilite.

Auction price records were broken in late 2014 as ultra-wealthy buyers vied for rare, important gemstones.

An oval-shaped faceted stone resembling an emerald proved to be a doublet with a beryl top and a topaz bottom.

Strong absorptions from N-V centers were the main cause of a CVD synthetic diamond’s pinkish orange bodycolor.

A very large diamond with a Fancy Vivid yellow color was identified as artificially irradiated.

Although this stone bore some superficial resemblance to moissanite, its gemological properties were consistent with HPHT synthetic diamond.

Melee diamonds can be efficiently screened for synthesis and treatment using infrared absorption spectroscopy, DiamondView imaging, and microscopy.

Examination of a pink-purple spinel revealed what appeared to be a spinel crystal inclusion.

The Stayish mine in Ethiopia’s Wollo province has been producing black opal since 2013.

A report on what appears to be the first non-nacreous beaded cultured pearl examined by a laboratory.

Review of Damiani: Alchemy of Desire.

Review of Mimi Lipton's Untamed Encounters: Contemporary Jewelry from Extraordinary Gemstones.

Review of Yvonne J. Markowitz and Denise Doxey's Jewels of Ancient Nubia.

Nine demantoids reportedly from a new deposit in the Khuzdar area in Pakistan’s Baluchistan province were recently examined.

What appeared to be high-quality jadeite was actually dyed green marble with calcite as the main mineral.

Samples composed of lawsonite pseudomorphs were coated to make them appear deep green and imitate chromian lawsonite crystals.

Ten loose pearls with interesting shapes and internal growth features were from Pteria-species mollusks.

一家大型的宝石矿业公司寻求改变世界收购和销售优质宝石的方式。

Hazel Forsyth（黑兹尔·福赛思）所著的“The Cheapside Hoard: London's Lost Jewels”（《奇普赛德宝藏：伦敦遗失的珠宝》）的评论。

在刚过去的假日季里，美国对钻石与珠宝的需求据估计增长了 3% 到 4%，但业务分布不均衡。