CollectionsApr 19, 2024
Piece of the Week: Retrouvaí’s Treasure NecklaceA new addition to the “Heirloom” collection, this one-of-a-kind piece features 32 custom-cut gemstones.
EditorsApr 18, 2016
A Hands-on Lesson in Telling Gemstones Apart
Senior Editor Brecken Branstrator recounts what she learned at an AGS Conclave education session on identifying gemstones presented by Gem-A.
The American Gem Society knocks it out of the park every year for their Conclave event. The keynote speakers are top-notch, and the education sessions cover a wide variety of topics presented by experts in the industry.
Held in Washington, D.C. this year, Conclave again was full of great sessions, from a panel on bridal trends, to updates on diamond prices and grading reports, to a fascinating session on diamonds and their healing powers.
A particularly cool one that I got to attend was held Friday by The Gemmological Association of Great Britain (Gem-A).
In “Separating Similar-Looking Stones,” Gem-A’s Claire Mitchell began by walking session attendees through the steps used to identify a stone, starting with observation and then working through the instruments that can help jewelers tell apart similar-looking stones.
I loved this session because it was a hands-on experience--half the session was a presentation and the other half had us using the instruments ourselves. (I think a lot of people were excited about this session, as it had a waiting list and attendees were lined up before it started. I was lucky enough to just make it in and get a seat with equipment.)
First, Mitchell walked us through what kind of observations can be made before using any instruments.
For example, inclusions such bubbles and swirls or molding marks that indicate a paste glass might tell you that a gemstone is man-made.
Inclusions in natural stones can help indicate what the stone might be as well, such as “horsetail inclusions” found in demantoid garnets or “lily pads” that show up in peridot.
Next, Mitchell walked us through the use of instruments such as a polariscope, spectroscope and a dichroscope.
We got to use all three on gemstone samples provided so we could see for ourselves how each worked and what the stones looked like through the instruments.
The polariscope, for example, can tell you if a stone has double or single refraction, while a spectroscope is a diagnostic tool showing a spectrum of colors that is “like having a bar code for a gemstone” to help with identification.
My personal favorite was the Chelsea Color Filter, which is a dichromatic filter that transmits two wavelengths only to help identify certain green, red and blue stones, as well as detecting dyes in certain gems.
Above is a picture of three different blue stones--aquamarine, topaz and spinel--under the filter.
I
love any opportunity that allows me the chance to learn more about stones, and the sentiment in the room seemed to indicate that everyone else found the session as useful as I did.
While I’m always trying to see if I can guess what a gemstone is when I see it, Gem-A stressed that there should always be more tests involved to figure out a stone’s true identity. This session definitely made me want to go out and get some of these instruments for myself.
While I’m always trying to see if I can guess what a gemstone is when I see it, Gem-A stressed that there should always be more tests involved to figure out a stone’s true identity. This session definitely made me want to go out and get some of these instruments for myself.
More on Editors
The Latest
CrimeApr 19, 2024
Grand Jury to Hear Case Against Jeweler Charged in Fatal Shove Following IJO ShowLast month in Dallas, David Walton pushed another jeweler, David Ettinger, who later died.
MajorsApr 19, 2024
Unique Designs Acquires China PearlThe move will allow the manufacturing company to offer a more “diverse and comprehensive” range of products.
Brought to you by
The Blueprint for Success in Scalable, Personalized Jewelry RetailWith Ho Brothers, you can unlock your brand's true potential and offer customers the personalized jewelry experiences they desire.
GradingApr 19, 2024
AGS Ideal Report Now Available in Printed FormFrom now through mid-May, GIA will be offering the reports at a 50 percent discount.
Weekly QuizApr 19, 2024
This Week’s QuizTest your jewelry news knowledge by answering these seven questions.
SourcingApr 18, 2024
Diamond Trade Remains Cautious Amid Economic UncertaintyDe Beers’ rough diamond sales were down 18 percent year-over-year in its latest round of sales.
Supplier BulletinApr 18, 2024
Discover History’s Hidden Gems at the Las Vegas Antique Jewelry & Watch ShowSponsored by the Las Vegas Antique Jewelry & Watch Show
Brought to you by
How Jewelers of America Represents Your BusinessFor over 30 years, JA has advocated for the industry, fought against harmful legislation and backed measures that help jewelry businesses.
WatchesApr 18, 2024
Watch E-tailer Collectability Hires Kelly YochThe Patek Philippe expert will serve as personal curator for the brand-focused company.
WatchesApr 18, 2024
TAG Heuer Opens Its Largest Standalone Boutique at SeaThe 553-square-foot shop is aboard the Carnival Jubilee cruise ship.
Policies & IssuesApr 17, 2024
NDC Prevails in U.K. Case Over Lab-Grown Diamond AdvertisingNDC filed a complaint against Skydiamond for use of phrases like “diamonds made entirely from the sky.”
Events & AwardsApr 17, 2024
And the 2024 Winner of the Shipley Award Is … John Carter received the AGS’s highest honor Tuesday afternoon at Conclave in Austin, Texas.
FinancialsApr 17, 2024
LVMH’s Q1 Jewelry Sales Fall 5%LVMH said the company performed well despite an uncertain geopolitical and economic environment.
MajorsApr 17, 2024
Stuller’s B&D Opens New HeadquartersB&D Sales and Service held a ribbon-cutting event for its new location in Cranston, Rhode Island.
CollectionsApr 16, 2024
Akaila Reid Launches ‘Eat Cake’ CollectionIt’s ultra-feminine and filled with gold, pearls, and soft pastels.
MajorsApr 16, 2024
Loudr Adds 2 DirectorsEmily Highet Morgan and Emily Bennett have joined the agency’s team.
MajorsApr 16, 2024
Stuller Releases First Lab-Grown Diamond Jewelry CatalogIts updated book for mountings is also now available.
SourcingApr 16, 2024
Karen Rentmeesters Takes Over as Interim CEO of AWDCShe has been with the organization since 2010, most recently serving as its chief officer of PR and industry relations.
TechnologyApr 15, 2024
Judge Rules Jeweler’s Lawsuit Against PNC Bank Can Move ForwardJoyce’s Jewelry sued the bank after cybercriminals drained its accounts of nearly $1.6 million through a series of wire transfers.
IndependentsApr 15, 2024
Alfred W. DeScenza of DeScenza Diamonds Dies at 95He is remembered by loved ones for his loyalty, integrity, and kindness.
AuctionsApr 15, 2024
Madeleine K. Albright Jewelry, Pins Coming to AuctionHosted by Freeman’s | Hindman, the sale will take place May 7-8.
AuctionsApr 15, 2024
All of Sotheby’s ‘Rough Diamonds’ Sold in Less Than an HourThe auction house said all 24 timepieces offered in its underground sale of rare and avant-garde watches quickly found buyers.
Events & AwardsApr 15, 2024
10 Can’t-Miss Sessions at AGS Conclave 2024From lab-grown diamonds and AI to the inevitable Taylor Swift mention, here are some of Conclave’s most intriguing educational offerings.
Recorded WebinarsApr 12, 2024
Watch: What Jewelers Need to Know About InsuranceFrom cybersecurity liability to trade show coverage, insurance experts share tips on how to build the right policy.
CollectionsApr 12, 2024
Piece of the Week: Lionheart’s Evil Eye Gemstone CharmThe charm is a modern rendition of the evil eye amulet that has been worn for thousands of years.
Events & AwardsApr 12, 2024
The Jewelry Symposium Announces 4 Scholarship WinnersAhead of its trade show next month, TJS awarded free registration and accommodations to one jewelry professional and three students.
Policies & IssuesApr 11, 2024
SRK Exports’ Journey Toward Net Zero Impact By the end of this year, SRK’s diamond manufacturing complexes will achieve net zero emissions, one of an impressive array of achievements.
