Lab-Grown

Gem-A Instruments Now Distributor for GemPen

Lab-GrownNov 12, 2020

Gem-A Instruments Now Distributor for GemPen

The portable device can be used to test diamonds to see if they are natural or lab grown and can also be used on colored gemstones.

20201112_GemPen_Gem_A.jpg
The portable GemPen can be used on diamonds, rubies and sapphires to determine if they are lab grown or treated. Gem-A Instruments just became the official distributor of the device in the U.K. and worldwide.

London—Gem-A Instruments, a subsidiary of Gem-A, is now the official distributor of the portable GemPen screening device in the United Kingdom and worldwide.

Invented by gemologist, geologist and Gem-A accredited Teaching Center tutor Torbjörn Lindwall and made by Swedish company Gemometrics AB, GemPen uses full-spectrum Xenon ultraviolet light technology with a unique combination of wavelengths and filters.

When pointed at a diamond, ruby or sapphire, the instrument’s ultra-spectrum optical filtering, or USOF, technology displays the stone’s unique fluorescence.

By analyzing this effect and comparing what they see with The Gemstone Map, a virtual image bank of reference diamonds, sapphires and rubies tested by GemPen, a user can determine if the stone they are looking at is natural or lab grown.

The map is accessible online through the GemPen Academy.

GemPen can also be used to determine various treatments (HPHT, irradiation, etc.) in both natural and lab-grown diamonds and gemstones.  

The GemPen Diamond Screener with filters 1 and 4 is priced at €2,050 ($2,419). GemPen Premium, which comes with all the filters, sells for €2,500 ($2,949). 

The premium version of the instrument is marketed more toward gemologists, as more knowledge is needed to get indications on sapphires and rubies, while the Diamond Screener can be used by anyone.

“[GemPen] is a beautifully portable tool that can be used for colored stones as well as being a valuable diamond screening instrument and I am sure that as we continue to test it, it will present many more applications in the future,” said Samantha Lloyd, instrument manager at Gem-A.

Gemometrics AB is a technology company based in Luleå, Sweden.

Gem-A Instruments is a subsidiary of Gem-A, a London-based provider of gemology education that has been around since 1908 and says it is the oldest provider of gemology education in the world.

The instruments division has supported Gem-A students and members with essential gemological equipment for more than 50 years.

Michelle Graffis the editor-in-chief at National Jeweler, directing the publication’s coverage both online and in print.

The Latest

Brilliant Earth Jolie Mosaics engagement ring
FinancialsAug 08, 2025
Brilliant Earth’s Q2 Sales Up 3% as Engagement Ring Sales Rise

The company raised its full-year sales guidance while noting it has not yet assessed the potential impact of the latest tariff news.

Jewellers for Hope charity event
Events & AwardsAug 08, 2025
GJEPC’s Jewellers for Hope Celebrates 10 Years of Fundraising

The organization has raised more than $1.3 million for charity since its inception.

Rahaminov Diamonds Emerald-Cut Diamond Bezel Bangle
TrendsAug 08, 2025
Piece of the Week: Rahaminov Diamonds’ Bezel Bangle

The brand’s latest iteration of a bezel-set diamond bangle features clean lines and a timeless design for a new modern silhouette.

rio-article photo-diamond.jpg
Brought to you by
Taking the Moment Head On: How Rio Grande Champions the Present & Future of Fine Jewelry

As a leading global jewelry supplier, Rio Grande is rapidly expanding and developing new solutions to meet the needs of jewelers worldwide.

Black and white photo of Tony Bennett near a microphone
WatchesAug 07, 2025
Bulova’s New Collection Honors Tony Bennett

The first watch in the series commemorates his participation in the Civil Rights movement, marching from Selma to Montgomery in 1965.

Weekly QuizAug 08, 2025
This Week’s Quiz
Test your jewelry news knowledge by answering these questions.
Take the Quiz
Rembrandt Blue Jay, Hummingbird, Cardinal Bird Charms
TechnologyAug 07, 2025
Rembrandt Charms Debuts New Website, Bird Charms

The company added a retailer dashboard to its site and three new birds to its charm collection, the cardinal, blue jay, and hummingbird.

Shipping containers on a ship
Policies & IssuesAug 06, 2025
Tariff on India to Rise to 50%, Trump Says

An additional 25 percent tariff has been added to the previously announced 25 percent.

an instructor and a student in a bench jewelry classroom
Brought to you by
Investing in the Next Generation of Bench Jewelers

The Seymour & Evelyn Holtzman Bench Scholarship from Jewelers of America returns for a second year.

Claire’s storefront
MajorsAug 06, 2025
Claire’s Files for Chapter 11 Bankruptcy Again

The jewelry and accessories retailer plans to close 18 stores as part of the proceedings.

Smith & Son Jewelers storefront Springfield Massachusetts
IndependentsAug 06, 2025
Smith & Son Jewelers to Close 107-Year-Old Location

Its Springfield, Massachusetts, store is set to close as owner Andrew Smith heads into retirement.

Zahn-Z Beluga Spout Grey Spinel Ring and Beluga Spout Mandarin Garnet Ring
CollectionsAug 06, 2025
Zahn-Z Swims With Whales in ‘Beluga’ Collection

Designer Hiba Husayni looked to the whale’s melon shaped-head, blowhole, and fluke for her new chunky gold offerings.

Paola De Luca presenting Trendbook 2026+ at Vicenzaoro
TrendsAug 06, 2025
Paola De Luca to Release Trendbook 2027+

She will present the 23rd edition of the trend forecasting book at Vicenzaoro on Sept. 7.

Omar Roy mugshot
CrimeAug 05, 2025
Report: Suspect Arrested in 1992 Murder of Miami Jeweler

Omar Roy, 72, was arrested in connection with the murder of jeweler Dionisio Carlos Valladares.

Mignon Faget Beyond Katrina Pendant and Beyond Katrina Pin
CollectionsAug 05, 2025
Mignon Faget Commemorates 20th Anniversary of Hurricane Katrina

The New Orleans-based brand’s “Beyond Katrina” jewels honor the communities affected by the storm.

National Jeweler columnist Lilian Raji
ColumnistsAug 05, 2025
The PR Adviser: Affiliate Marketing Is the Cost of Coverage

Lilian Raji explains why joining an affiliate network is essential for brands seeking placements in U.S. consumer publications.

Jewelers of America Logo
Events & AwardsAug 05, 2025
JA Announces Seymour & Evelyn Holtzman Bench Scholarship Winners

The organization has awarded a total of $42,000 through its scholarship programs this year.

2026 Gem Awards logo
Events & AwardsAug 04, 2025
Gem Awards, David Yurman Introduce $50K Grant for Emerging Designers

The winner of the inaugural David Yurman Gem Awards Grant will be announced live at the 2026 Gem Awards gala.

Marlo Laz peridot and diamond Alexandra earrings
TrendsAug 04, 2025
Amanda’s Style File: August’s Bright Baubles

As summer winds down, celebrate the sunny disposition of the month’s birthstones: peridot and spinel.

Surveillance image of Watch King robbery suspect
CrimeAug 04, 2025
‘The Watch King’ Assaulted, Robbed in Queens

Moshe Haimoff, a social media personality and 47th Street retailer, was robbed of $559,000 worth of jewelry by men in construction outfits.

Xavier Dibbrell
MajorsAug 04, 2025
Borsheims Welcomes New Assistant Facilities Manager

Xavier Dibbrell brings more than a decade of experience to the role.

Signet Jewelers logo
MajorsAug 01, 2025
Helzberg President Julie Yoakum Moves Over to Signet Jewelers

The addition of Yoakum, who will lead Kay and Peoples, was one of three executive appointments Signet announced Thursday.

Mike Alexander
MajorsAug 01, 2025
Jewelers Mutual Names Mike Alexander as President

The insurance company’s previous president and CEO, Scott Murphy, has split his role and will continue as CEO.

 Gemfields rough rubies
SourcingAug 01, 2025
Gemfields’ Auction Revenue Drops 50% in H1

The nearly six-month pause of operations at its Kagem emerald mine earlier this year impacted the miner’s first-half results.

Hernsdorf Tears of Aphrodite Necklace
CollectionsAug 01, 2025
Piece of the Week: Hernsdorf’s ‘Tears of Aphrodite’ Necklace

The necklace uses spinel drops to immortalize the moment Aphrodite’s tears mixed with her lover Adonis’ blood after he was fatally wounded.

Stock image of a polished diamonds being held by tweezers
SourcingJul 31, 2025
De Beers Records $189M First-Half Loss

The diamond miner and marketer warned last week that it expected to be in the red after significantly cutting prices in Q2.

Lindsey Scoggins Studio convertible flower earrings
Events & AwardsJul 31, 2025
These Are the 2025 CASE Award Winners

Jewelers of America’s 35th annual design contest recognized creativity, artistry, style, and excellence.

Matthew Tratner, new president of Continental Buying Group
IndependentsJul 31, 2025
Matthew Tratner Takes Over as CBG President

Tratner succeeds Andie Weinman, who will begin stepping back from the buying group’s day-to-day operations.

×

This site uses cookies to give you the best online experience. By continuing to use & browse this site, we assume you agree to our Privacy Policy