Gemstone Knowledge
SOOKJAI KNOWLEDGE
Gemstone Knowledge
A considered guide to gemstones — from colour and cut to origin, treatment and the stories behind each stone.
Emerald · Treatment
Minor, Moderate and Significant Oil: What Do They Actually Mean?
Minor, moderate and significant are commonly seen on emerald reports, but they are often misunderstood. Learn what these treatment levels actually describe, what they do not tell you, and how to read them in the context of the whole emerald.
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Emerald · Treatment
Emerald Treatments Explained: Oil, Resin and Clarity Enhancement
Oil, resin, minor, moderate and no indications of enhancement can sound confusing. Understand what emerald clarity enhancement actually does, how laboratories describe it, and why treatment is information rather than a simple measure of beauty.
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Spinel · Treatment
Natural Spinel: Is Spinel Usually Treated?
Natural spinel is commonly encountered without treatment, but spinel can still be heated, fracture-filled or subjected to specialised diffusion treatments. Learn what is common, what has been documented, and why untreated status should be understood rather than assumed.
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Sapphire · Treatment
Heated vs Unheated Sapphire: What Does It Really Mean?
Heated and unheated describe treatment history, not whether a sapphire is real or beautiful. Learn why sapphire is heated, what a no-heat result means, how laboratories assess treatment, and why disclosure matters.
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