ruby

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  Advanced-Scientific GEM Program (RECORDED)

  USD $99.00 – USD $595.00 Select options This product has multiple variants. The options may be chosen on the product page
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  Basic – Intermediate GEM Program (RECORDED)

  USD $79.00 – USD $295.00 Select options This product has multiple variants. The options may be chosen on the product page
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  2024 – Possibilities and limitations of origin and treatment determination of major gemstones – Part 1

  USD $39.00 Add to cart
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  2024 – Possibilities and limitations of origin and treatment determination of major gemstones – Part 2

  USD $39.00 Add to cart
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  2024 – Colored stones Spectroscopy

  USD $39.00 Add to cart
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  2024 – History of origin determination of gemstones

  USD $19.00 Add to cart
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  2022 – “Gem Country of Origin”- RUBY & SAPPHIRE

  USD $39.00 Add to cart
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  Advanced Coloured Stone Program: Ruby, Sapphire and Emerald (1 day)

  USD $450.00 Add to cart
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  Ruby & Sapphire: Treatments and Identification – Decades of Advancement

  USD $35.00 Read more