Lab also rolling out new comments clarifying impact of fluorescence.
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Mimi So necklace and Ben Kho octagonal kunzite take home prizes in the categories.
Lab-grown will remain at the current reduced rate of 18%.
Move aims to combat rising silver and gold prices.
Consumers are likely to shell out $7 billion on the category before February 14.
Miner slashes production guidance for full year to match demand.
For now, nothing is final; exemption remains a few steps away.
X-ray identifies large cavities containing foreign materials.
1-carat RAPI down 1.3% in January.
Market Comment: February 5, 2026