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Showing posts with label gem identification. Show all posts
Showing posts with label gem identification. Show all posts

Monday, November 21, 2022

Fraudulently Inscribed Synthetic Moissanite

Consumers beware. In addition to diamonds and synthetic moissanite, GIA has previously identified laser inscriptions on cubic zirconia, diaspore, emerald, garnet, ruby, sapphire, spinel, tanzanite and other materials. If doubtful always consult a reputed gem testing laboratory like the GIA.


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Tuesday, November 02, 2021

Identifying Gemstone Inclusions At First Sight

E. Billie Hughes was spot on. When you sit in front of the microscope to view the known unknown and unknown unknown gem inclusions the challenges are immense. Reference resources and analytical gem instruments can be useful, if you are properly trained. Intellectual curiosity is also an added virtue. At the end of the day it's deliberate practice that makes you near-perfect. The micro world is truly a fascinating adventure for gemologist with limitless patience.


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Sunday, July 18, 2021

Identification Of Resin-Filled Turquoise

Gem identification and treatments are evolving domains. GIA's report on identification of resin-filled turquoise was an insightful research story. The effectiveness of pore-filling treatment in improving appearance and durability of turquoise is an accumulated skill. It needs to be fully disclosed to the consumer. Period.


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Saturday, October 24, 2020

GIA System Detects Lab-Growns In Melee

GIA has launched an automated system that can distinguish lab-grown melee diamonds from natural melee diamonds. According to GIA, the screening technology is accurate and fully automated. It can screen 1800 to 2000 melee diamonds per hour and can sort diamonds by color. The service is available for melee 0.9 to 4.0 mm (approximately 0.005-0.25 carat) round, D-Z diamonds, which must be cleaned prior to submission.


Useful link:
https://www.gia.edu

Wednesday, September 11, 2019

GIA iD100

GIA (Gemological Institute of America) has released a software update for its iD100 gem-testing device. The upgrade means the instrument can distinguish natural pink diamonds from laboratory-grown (HPHT and CVD) diamonds and diamond simulants.

GIA also released a free update to the existing GIA iD100 software with the expanded capability to screen blue-to-green and brown diamonds. This update must be installed before the pink diamond software upgrade can be added.

The new software can be purchased from the GIA Store for $249 for current owners. It is pre-installed on new devices. 

Friday, April 19, 2019