REGULATIONS ON RECORDING GEMSTONE TREATMENT METHODS ON GIVLAB CERTIFICATES

Recognizing that treatment methods can significantly impact value, GIVLAB consistently aims to uphold the highest standards of transparency and accuracy. Therefore, whenever possible, we provide comprehensive details about any treatment methods that have been applied or detected to support objective and thorough analysis and evaluation for all stakeholders.

RUBY & SAPPHIRE

• No signs of heat treatment: No indications of heat treatment.
• Signs of heat treatment: Indications of heat treatment detected.
• Clarity enhanced: Clarity improvement through treatment.
• Diffusion: Surface diffusion/star diffusion.
• Dyed: Color dyed.

EMERALD

Clarity enhancement treatments can be categorized as: none (no enhancement), minor (low enhancement), moderate (medium enhancement), and significant (high enhancement), depending on the amount of filler material detected in surface cavities or cracks.

Clarity Enhancement:

• No indications of clarity enhancement: No detectable clarity enhancement treatment.

Quantification of Clarity Enhancement:

None	Minor clarity enhancement	Moderate clarity enhancement	Significant clarity enhancement
F1	F2	F3

• None: No signs of oiling or impregnation, resulting in no improvement in clarity.
• Minor: Minimal traces of oil, leading to a slight clarity enhancement.
• Moderate: Moderate amounts of oil, resulting in a medium clarity improvement.
• Significant: Clear indications of substantial oil usage, significantly enhancing clarity.

JADEITE

• Type A: No enhancements except for traditional polishing. (Fei Cui Type A)
• Type B: Jadeite is bleached and then impregnated with polymer. (Fei Cui Type B)
• Type C: Colored with dyes. (Fei Cui Type C)
• Type B+C: Polymer-impregnated and dyed jadeite. (Fei Cui Type B + C)
• Type D: Composite jadeite (Fei Cui Type D).

PEARL

Pearls are currently categorized into four quality grades and are widely recognized globally:

• A: Pearls with low luster, and more than 25% of the surface has blemishes. (A+ >25%; A- <25%)
• AA: Pearls with high luster, and at least 75% of the surface is blemish-free. (AA+ >75%; AA- <75%)
• AAA: Pearls with very high luster, and more than 95% of the surface is blemish-free.