G&G eBrief

Volume 2, No. 12
Featuring: A rare Fancy Vivid purple diamond, a new dyed purple opal, Vietnamese aquamarine mining, and Chinese freshwater cultured pearls beaded with baroque freshwater cultured pearls.

Volume 2, No. 12
Featuring: A large HPHT-annealed pink diamond, unusually high beryllium content in three blue sapphires, a new find of color-change garnet in Tanzania, and a jewel that survived 9/11.  

Volume 2, No. 11
Featuring: Unusual beryllium-diffused pink sapphire, Mexican blue opal mine reactivated, and Nuummite from Mauritania. 

Volume 2, No. 10
Featuring: Fluorescence contributing to strong pink color in treated synthetic diamonds, black diamond coloration enhanced by a coating, and an update on emerald mining in Afghanistan.

Volume 2, No. 9
Featuring: A coated diamond with the spectroscopic features of a natural-color pink, an update on sapphire mining in Sri Lanka, and a glass triplet resembling coated “mystic topaz.”

Volume 2, No. 8
Featuring: Gemesis releases CVD-grown synthetic diamonds, HPHT treatment used for subtle diamond color enhancement, and afghanite from Afghanistan.

Volume 2, No. 7
Featuring: Glowing type IaB diamonds, beryllium- and tungsten-bearing sapphires from Afghanistan, and “Colombian emerald” revealed as plastic-coated quartz.

Volume 2, No. 6
Featuring: A very large HPHT-treated diamond; update on emerald mining at Kagem, Zambia; and a skillfully crafted non-nacreous pearl imitation.

Volume 2, No. 5
Featuring: Large HPHT-treated cape diamond; synthetic star spinel imitation of moonstone; and new spinel deposit in northern Vietnam.

Volume 2, No. 4
Featuring: Silicon feature in HPHT synthetic diamond indicates treatment; a rare green natural pearl; a new twist on Paraíba-type tourmaline: liddicoatite; and using your LCD screen as a gemological tool.

Vol. 2, No. 3
Featuring: GIA Laboratory sees influx of 5 to 10+ ct HPHT-treated diamonds; synthetic ruby specimen sold as natural; and 5th century garnet jewelry from Romania.

Vol. 2, No. 2
Featuring: Largest (4+ ct) HPHT-grown synthetic diamond graded by GIA; new field research confirms Tibetan andesine; recent finds of aquamarine and heliodor in Indochina; and luxury market expected to grow by double digits.

Vol. 2, No. 1
Featuring: Synthetic spinel and synthetic ruby doublet; Madagascar sapphire mining update; and Louis XV's Golden Fleece, recreated.

Vol. 1, No. 12
Featuring: Intense purplish pink synthetic diamond, HPHT grown and treated; update on ruby and sapphire mining in Pakistan and Afghanistan; and natural pearl diving off the coast of Bahrain.

Vol. 1, No. 11
Featuring: Identification of melee-size yellow synthetic diamonds; a sapphire inclusion in a natural sapphire; tanzanite and other gems set with colored adhesive; and lead-glass-filled ruby set in antique jewelry.

Vol. 1, No. 10
Featuring: "Fancy" pink diamonds revealed as coated pale pinks; lead-glass-filled ruby damaged during jewelry repair; ruby from Cabo Delgado, Mozambique; and unusual facet arrangement producing a scalloped appearance in diamond

Vol. 1, No. 9
Featuring: HPHT-treated diamond, graded Fancy Vivid blue; green Be-diffused sapphire; update on ruby, sapphire, and spinel Mining in Vietnam; and fine chrysocolla chalcedony from Acari, Peru.

Vol. 1, No. 8
Featuring: Heat-treated spinel, a CVD synthetic diamond over one carat, "soufflé" freshwater cultured pearls, spinel from Myanmar, and a report on the luxury goods sector.

Vol. 1, No. 7
Featuring: Diamond with rare green fluorescence, identifying irradiated black diamonds, treated CVD-grown pink synthetic diamond melee, and proof that the Hope diamond did not have “sister” stones.

Vol. 1, No. 6
Featuring: Red CVD synthetic diamond with multiple treatments, an unusually large pair of natural freshwater pearls, tsavorites from northern Tanzania, and a unique gemstone tapestry.

Vol. 1, No. 5
Featuring: Black synthetic moissanite, large HPHT-treated type IIb blue diamond, the historic Hope and Wittelsbach-Graff Blue diamonds, and andradite from China.

Vol. 1, No. 4
Featuring: Titanium- and beryllium-diffused blue sapphires, exceptionally transparent treated jadeite, chrysoprase and prase opal from central Tanzania, and green glass imitation of peridot and other gems.

Vol. 1, No. 3
Featuring: Nanocut plasma-etched diamonds with enhanced fire, update on rubies from Mozambique, and a new find of pink and red tourmaline in Nigeria.

Vol. 1, No. 2
Featuring: Queen conch cultured pearls, a new chalcedony treatment, dyed sillimanite imitation of emerald, and the De Beers “Everlon Love Knot” campaign.

Vol. 1, No. 1
Featuring: Treated-color pink diamonds, treated green turquoise, synthetic emerald sold as rough, and large cat's-eye beryls from India.