Opals in the Harvard Mineral and Gem Collection
The mineral collection of the Mineralogical and Geological Museum at Harvard University (MGMH) has played a significant role in the advancement of the science of mineralogy.
Featured ArticlesDiamond Market – May/June 2021
So, when you hear jewelry sales are up 106% (Diamonds.net) from last March you have to understand that’s good but not as spectacular as you would think at a glance.
Diamond MarketColored Stone Market – May/June 2021
As summer approaches here in the United States, the colored stone trade continues to experience some degree of COVID-19 related disruption. Issues are occurring at varying degrees along the entire length of the supply chain.
Colored Stone MarketPink Diaspore
Much of the pink diaspore rough seen to date has areas capable of cutting medium to large size stones that are eye clean and in many cases loupe clean
Gem NotesThinking Broadly Inside the Box
Sometimes appraisers forget to work within boundaries to achieve success. Since we are related to the jewelry trade, gemologist-appraisers might want to think broadly inside the box.
News ArchiveRed and Hot Purple Tourmaline
Unheated and vividly colored purplish red cuprian tourmalines have gained a special niche and become more of a collector’s stone, while rubellite remains one of the favorite tourmalines in the market.
Market TrendsGem Focus – April 2021
Value of pyrite is as diverse as its use. While pyrite crystal specimens or pyritized fossils from famous localities would fetch thousands of dollars, small faceted pieces or beads would be sold in bulk for a few dollars only. Naturally, any custom jewelry piece would be valued based on the design and the designer, not the pyrite itself.
*Gem Focus & Market Pulse (Free Subscriber)Colored Gemstone Market Trends in Uncertain Times Webinar Series: April 2021
Our guest is Roland Schluessel, FGA of Pillar & Stone International. Roland has built his business by supporting his trade clients with fine colored gems that he has sourced directly on location. His booth in Tucson is a favorite destination for GemGuide researchers because of his knack for recognizing popular trends in colored stones before they take shape.
Colored Stone MarketLab Grown Diamond Price Index – 2nd Quarter 2021 Market Report
As production grows, there are conflicting opinions on the supply and demand of LGDs.
Lab-Grown Diamond Price IndexGem Focus – March 2021
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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