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Gem Focus March 2021: Pearls

Posted on March 9, 2021 by Çiğdem Lüle, PhD, FGA, GIA GG, DGA

A lustrous image of a white round object with subtle iridescence is the first thing that comes to mind when the word “pearl” is mentioned. The rare product of oysters from the vast oceans or unassuming mussels of rivers have always mystified human beings. Until pearl culturing was understood and studied over 100 years ago, many civilizations created divine stories about pearls and their origin. Technically, a reject of a bivalve, natural pearls are celebrated as a beautiful gemstone, not only due their rarity but also for their minimum processing for jewelry. Even though, pearl culturing gave access to much more common and affordable products. Iridescence, specifically “orient” for pearls has been one of the most desirable features of a pearl regardless of origin.

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Gem Focus February 2021: Chalcedony

Posted on February 8, 2021 by Çiğdem Lüle, PhD, FGA, GIA GG, DGA

Pricing of chalcedony varies greatly. While small, calibrated cabochons are sold at very low-price points, the unusual and rare ones are priced individually, especially if they are custom cuts.

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Gem Focus January 2021: Amber

Posted on January 13, 2021 by Çiğdem Lüle, PhD, FGA, GIA GG, DGA

Amber: An organic gem that serves as mother nature's enigmatic time capsule.

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Gem Focus December 2020: Black Diamonds

Posted on December 8, 2020 by The Gemworld Staff

Black gems tend to be ranked towards the lower end of value chain in the gem market. Thanks to increasing interest in unusual gem materials and advertising, they recently have acclaimed quite a recognition.

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Gem Focus November 2020: Beads

Posted on November 10, 2020 by The Gemworld Staff

Beads; The Original Jewelry Style The discovery of 13 deliberately perforated shell beads that were stained with red ochre and showed significant wear in the Grotte des Pigeons at Tafora in Eastern Morocco in late 2000s…

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Gem Focus October 2020: Zircon

Posted on October 6, 2020 by The Gemworld Staff

While colorless zircon was considered a convincing substitute of diamond for centuries before cubic zirconia or moissanite appeared in the market, all other colors were enjoyed in their own merit thanks to its high dispersion.

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Gem Focus September 2020: Iolite

Posted on September 9, 2020 by The Gemworld Staff

The eye visible purple-violet pleochroism of iolite is often one of the first gems used to introduce gemology to beginners because of its almost magic like optical feature.

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Gem Focus August 2020: Goldstone, Sunstone, Aventurescence; A Sparkling Enigma of Centuries

Posted on August 12, 2020 by The Gemworld Staff

Gemstones with unusual optical effects are defined as phenomenal gems. Their unusual effect can designate a variety within a species and add value.

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Gem Focus July 2020: Pariba Tourmaline

Posted on July 7, 2020 by Gemworld Staff

Clarity enhancement; probably the oldest gem treatment method...

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Gem Focus June 2020: Kunzite: a rosy spodumene with an American name

Posted on June 9, 2020 by The Gemworld Staff

Spodumene is almost exclusively a pegmatitic mineral of the pyroxene group that forms in monoclinic system with a chemical formula of LiAlSi2O6. Its hardness is 6.5 to 7 on the Mohs’ scale and displays perfect prismatic cleavage. Transparent and colored varieties show strong pleochroism. Strangely, the name spodumene means “ash-colored” in Greek referring to the dull and colorless examples when it was first named in the second half of the 19th century.

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