Showing posts with label Nathan Renfro. Show all posts
Showing posts with label Nathan Renfro. Show all posts
Monday, November 09, 2020

A Gem Dealer’s Journal

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Q & A by Asia Lounges with GIA's Nathan Renfro, a brilliant gem inclusionist. Useful link: https://www.asialounges.com/blogs/a-gem-d...
Saturday, August 15, 2020

Reversible Twinning In Neodymium Pentaphosphate

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For practising gemologists only. Neodymium pentaphosphate is a rare experimental synthetic material that shows reversible lamellar twinning ...
Saturday, August 01, 2020

Unknown Inclusion In Triphane Spodumene

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Raman microspectrometry wasn't able to identify the orange inclusion. This was because the crystal faces of the spodumene were etched, w...
Tuesday, November 05, 2019

Mexican Opal With Large Fluid Inclusion

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Take a look. Useful link: https://www.gia.edu/gems-gemology/summer-2019-microworld-mexican-opal-large-fluid-inclusion
Wednesday, October 30, 2019

Dioptase In And On Quartz

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Take a look. Useful link: https://www.gia.edu/gems-gemology/summer-2019-microworld-quarterly-crystal-dioptase-quartz
Wednesday, October 09, 2019

Lazurite In Spinel

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Take a look. Useful link: https://www.gia.edu/gems-gemology/spring-2019-microworld-lazurite-in-spinel
Wednesday, October 02, 2019

Plume Agate From Iran

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I love agates. Useful link: https://www.gia.edu/gems-gemology/summer-2019-gemnews-plume-agate-from-iran
Wednesday, August 21, 2019

Iridescent Tabasco Geode

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A true Mexican beauty. Useful link: https://www.gia.edu/gems-gemology/summer-2019-microworld-iridescent-tabasco-geode
Saturday, August 03, 2019

Native Copper Inclusions In Indonesian Purple Chalcedony

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One of a kind gem inclusion. Take a look. Useful link: https://www.gia.edu/gems-gemology/spring-2019-microworld-native-copper-inclusions-...
Thursday, July 11, 2019

Fossil Insect In Opal

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A most unusual opal with rare inclusion. Useful link: https://www.gia.edu/gems-gemology/spring-2019-microworld-fossil-insect-in-opal
Wednesday, May 15, 2019

Lepidocrocite In Boulder Opal

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Take a look. Useful link: https://www.gia.edu/gems-gemology/winter-2018-microworld-lepidocrocite-in-boulder-opal
Thursday, April 25, 2019

Microscopic Observations Of Blue Sapphires Treated With Heat And Pressure

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There will be always news ways to enhance colored stones because of new technology, rough materials from new sources, money, with a bit of g...
Friday, December 07, 2018

Gilalite Altered To Cuprite In Quartz

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One of a kind gem inclusion. Take a look. Useful link: https://www.gia.edu/gems-gemology/summer-2018-microworld-gilalite-altered-to-cupri...
Tuesday, July 17, 2018

Opal From West Java, Indonesia

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Take a look. Useful link: https://www.gia.edu/gems-gemology/spring-2018-gemnews-opal-from-west-java
Tuesday, June 12, 2018

New Plastic Imitation Opal From Kyocera

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Opal imitation update. Useful link: https://www.gia.edu/gems-gemology/spring-2018-labnotes-new-plastic-imitation-opal-from-kyocera
Tuesday, May 29, 2018

Vesuvianite In Burmese Ruby

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Take a look. Useful link: https://www.gia.edu/gems-gemology/winter-2017-microworld-vesuvianite-burmese-ruby
Wednesday, March 21, 2018

Update On Dyed Hydrophane Opal

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Buyer beware. Useful link: https://www.gia.edu/gems-gemology/winter-2017-gemnews-update-dyed-hydrophane-opal
Saturday, December 30, 2017

“Flower In The Rain” Inclusion In Sri Lankan Sapphire

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Simply beautiful. Useful link: https://www.gia.edu/gems-gemology/fall-2017-microworld-sri-lankan-sapphire
Saturday, October 21, 2017

Colorful Chatoyant Glass

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Take a look. Useful link: https://www.gia.edu/gems-gemology/summer-2017-gemnews-colorful-chatoyant-glass
Tuesday, October 10, 2017

Big Sky Country Sapphire: Visiting Montana’s Alluvial Deposits

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A must visit. Useful link: https://www.gia.edu/gems-gemology/summer-2017-montana-alluvial-deposits