Category: Featured Articles

Reigniting Diamond Desire

Depressed demand for jewelry is hurting everyone—from miners to retailers—in the supply chain. The GemGuide talked to industry leaders to explore opportunities for change and learn how to reignite consumer passion for our product. De Beers…

The Rarity of Tanzanite

In 1967, blue-violet crystals of the mineral species, zoisite, were discovered south of Mount Kilimanjaro in northeast Tanzania. The host rocks of the discovery, which are orders of magnitude older than Africa’s highest mountain, form…

The Gem Trade of Tanzania

Tanzania is host to a vibrant gem trade. The country, like its East African neighbors, is rich with mineral deposits, many of which are relatively recent discoveries. For miners and traders, the wealth inherent in…

Enhanced Lapidary Materials

FANCY COMPRESSED BLOCKS: THE LATEST TREND We all love using natural untreated gem materials for our lapidary projects and jewelry artwork. We like the organic feel, the symphony of colors, the diversity of textures, the quality…

The Hamlin Necklace

The Hamlin Necklace is a treasure of the Mineralogical and Geological Museum at Harvard University (MGMH) that was designed and commissioned by Augustus Choate Hamlin in the late nineteenth century. (See cover photo.) Apreeminent piece in…

Handheld Spectroscopy

The spectroscope is a very useful gemological instrument that is underutilized by gemologists worldwide. Learning to master this tool will greatly help in practical gem testing and identification. CORRECT METHODS AND APPROACH IN GEM TESTING Spectroscopy…

WHEN THE MOUNTING GETS ROUGH

Rough-gem-set jewelry maintains its popularity among entry-level buyers and shrinking violets for its understated glam and one-of-a-kind effects. Offer rough options to clients who have everything or their daughters with tighter budgets; you may be surprised at…

Inhorgenta Munich Trade Fair 2017

The show featured six halls: Timepieces, Technology & Bijoux, Fine Jewelry, Elegance & Lifestyle, Carat and Contemporary Design, and Vision. The Inhorgenta Show was held February 18-21 at the Messe Munchen Fair Grounds (Munich) Germany. The…