From the Gem & Mineral Vault
Rhodochrosite
from Peru
on view at the Harvard Mineralogical & Geological Museum (MGM), Cambridge, Massachusetts, across the Charles River from Boston.
Photo by Gary Roskin
What is a “Circular Brilliant”?
The Palm Tree BroochChristie's Auction, Dec. 6
Gary Roskin -Roskin Gem News Report -December 07, 2022 -
The Palm Tree Brooch, a Cartier estate piece, was...
An Unusual Pearl: Coated or Not?
Roskin Gem News ReportGary Roskin
Conch Pearl: Coated, or not?
Identification of pearl coatings can be a bit tricky, especially if the coating has been performed...
Making an Impression: The Art and Craft of Ancient Engraved Gemstones
Virtual Exhibition Tour Available here belowEmory University, Michael C. Carlos MuseumAtlanta, Georgia, USA
According to Emery University, “Making an Impression: The Art and Craft of...
Not Just Another Pocket Stone
A genuine Munsteiner "pocket stone," cut and polished by Tom Munsteiner. Isn't it interesting that while the gem artist feels this is something you...
2022 CGA Gem Conference
2022 CGA Gem Conference, October 21-23 – Vancouver, BC
Over the next several weeks, the Roskin Gem News will feature the guest speakers who presented...
Ti Surface Diffusion: Just when you thought it was an easy identification
New research shows that the titanium surface diffusion treatment is being polished off the facets, but left inside cavities and fractures. Stone Group...
A Wearable ET Pallasitic “Death Star”
by Charles Michael Designs
Charles is an extraordinary jeweler, and of course, on our "radar" since he has a talent for bringing out the best...
Lizzadro: Celebrating 60 years!
New Exhibit Celebrates the Lizzadro Museum’s 60th Anniversary “On The Cutting Edge - Contemporary Gemstone Sculpture”By Helen Serras-Herman
A fabulous exhibit titled “On the Cutting...
Will Singapore be the new Hong Kong? All signs say No.
Gary RoskinRoskin Gem News Report
Will Hong Kong ever recover from past Covid restrictions and political turmoil? Businesses have flocked elsewhere.
"All roads lead to JGW...
A Personal Flight: Peridot from Space
by Rick StinsonThe “New” 4 Billion-Year-Old Gem
Peridot From A Pallasite Meteorite
Pallasite meteorites have been known since the German naturalist Peter Pallas (1741–1811), who studied in...
Fluorescence that proves Natural
Stone Group LaboratoriesCara & Bear Williams
Findings from Stone Group Laboratories shows the blue/white fluorescence in diamond can only be natural in origin.
Many gemstones...
