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  2022 – “Opal Testing and Value”

  USD $39.00 Add to cart
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  2022 – “Identification of Colored Diamonds”

  USD $39.00 Add to cart
• 

  2022 – “Gem Country of Origin”- EMERALDS

  USD $39.00 Add to cart
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  2022 – “Gem Country of Origin”- RUBY & SAPPHIRE

  USD $39.00 Add to cart
• 

  2022 – “Identification of Colorless Diamonds”

  USD $39.00 Add to cart