*Gem Focus & Market Pulse (Free Subscriber)

Gem Focus August 2022: Rhodochrosite; a rose-colored ornamental gem rarely seen in transparent form…

Posted on August 10, 2022 by Çigdem Lüle, PhD, FGA, GIA GG, DGA

Rhodochrosite is a manganese carbonate mineral (MnCO3) with low hardness of 4 and three directional perfect cleavage. The structure is very similar to calcite since it is a calcite group mineral with remarkable coloration thanks to manganese.

Read

News Archive

Lab-Grown Diamond Market Report

Lab-grown was the talk of Vegas, with more booths than ever. This sector keeps growing in bridal but as more companies come in, will there be an oversupply? Prices continue to decrease, now with discounts in the 85-95% range from natural.

Welcome to the Carnival…

The diamond market for both rough and polished is starting to be a roller coaster ride. Previously, price hikes were focused on larger diamonds, now on melee. Origin is becoming a more important topic, especially with Russian sanctions. GIA is going digital with reports.

Aragonite & Calcite

Just as graphite and diamond have the same chemical composition but crystallize in two different systems, so is the case with aragonite and calcite

Circling the Drain

“The lay litigant enters a temple of mysteries whose ceremonies are dark, complex, and unfathomable. Pretrial procedures are the cabalistic rituals of the lawyers and judges who serve as priests and high priests. The layman…

Mint Tourmaline

The term mint is generally applied to light to medium green to blue-green tourmalines with high saturation with no gray or brown component. Tourmaline gemstone varieties are known to fall into any color of the spectrum…