Article Search Results

Types

Articles (44)

Content Type

Lab Notes (2) Gem News International (3) Reviews (2) Abstract (1) Feature (3) Micro-World (1)

Reviewed

Peer Reviewed (19)

Topics

See All Topics

Gemstones

Diamond (14) Sapphire (13) Emerald (10) Pearl (9) Ruby (5) See All Gemstones

XClear Selections

This etch channel seen in the crown facets of a 1.00 ct diamond with SI<sub>1</sub> clarity (left) resembled a <em>gada</em> (right), a mace-like weapon wielded by the Hindu god Hanuman. Photomicrograph (left) by Deepak Raj; field of view 0.80 mm. Photo (right) courtesy of the Metropolitan Museum of Art.

Inclusion Resembling a Gada in Diamond

Rujal Kapadia, Bhavya Maniar, and Sally Eaton-Magaña, November 3, 2023

An etch channel in the crown facets of a diamond resembles a mace-like weapon.

Figure 1. The Lord Hanumana pearl (left, 33.70 × 32.98 × 24.64 mm) and the Lord Ganesha pearl (right, 10.59 × 10.21 × 9.18 mm). Photo by Gaurav Bera.

Two Pearls of Indian Cultural Significance

Nishka Vaz, Rajesh Patel, and Abeer Al-Alawi, August 4, 2023

Two pearls representing Indian deities were recently examined in the Mumbai laboratory.

Figure 1. Surbhi’s “Orient” earrings with tanzanite carvings surrounded by blue sapphires, emeralds, white diamonds, and tsavorite garnets with an upper flower-shaped dangle composed of faceted tanzanites, emeralds, and pink sapphires, all set in 18K white gold. The total diamond weight for the pair is 1.60 carats, and the total colored stone weight is 62.23 carats, 48.32 carats of which are from the two tanzanite carvings. Photo by Robert Weldon; courtesy of YNY Jewels Inc. and Karats Inc.

YNY Jewels: Designer Surbhi Pandya

Jennifer Stone-Sundberg and Si Athena Chen, May 23, 2023

Handcrafted jewelry pieces featuring tanzanite carvings stood out at the GJX show.

A 7.94 ct rectangular step-cut rhodochrosite from the Sweet Home mine in Colorado’s Alma Mining District. Photo by Robert Weldon; courtesy of Barker & Co.

Sweet Home Mine Rhodochrosite from 1888

Erin Hogarth, May 23, 2023

A rhodochrosite on display at AGTA dates back more than a century to Colorado’s Alma Mining District.

Figure 9. The parcel of rough spinel on the left, reportedly from Tajikistan, contains pieces weighing up to 48.5 g. The seven faceted spinels on the right (9.04–28.16 ct) were fashioned from some of this rough.

Purplish Pink Spinel from Tajikistan: Before and After Cutting

Nicholas Sturman, March 1, 2009

Purplish Pink Spinel from Tajikistan: Before and After Cutting

Jeffrey Bilgore pendant inspired by The Lord of the Rings, featuring blue sapphire and diamonds.

Blue Sapphire Lord of the Rings Pendant

Erin Hogarth, May 13, 2022

After 15 years in the making, Jeffrey Bilgore’s stunning blue sapphire pendant makes its debut at the AGTA show.

History of the Chivor Emerald Mine, Part II (1924–1970): Between Insolvency and Viability

Karl Schmetzer, Gérard Martayan, and Andrea R. Blake, October 22, 2020

Chronicles developments at the Chivor emerald mine in Colombia between 1924 and 1970, based on archival records.

Gemstone classics from sources old and new

The Geographic Origin Dilemma

Shane F. McClure, Thomas M. Moses, and James E. Shigley, January 31, 2020

An overview of the geographic origin complexities facing the gem and jewelry industry today.

Gemstones in the Era of the Taj Mahal and the Mughals

Dona Mary Dirlam, Chris L. Rogers, and Robert Weldon, November 15, 2019

A look at the gem ornamentation of this landmark, as well as the jewels of the Mughal dynasty.

Article

Sapphire History and Lore

Traditionally, sapphire symbolizes nobility, truth, sincerity, and faithfulness.

Article Search Results

Types

Content Type

Reviewed

Topics

Topics

Gemstones

Gemstones

Find a Retailer

Shop the Campus Store

Subscribe to Knowledge Rocks Emails

Learn About Diamond Origin Reports