Institute reduces per-stone fee for synthetic and natural testing.
New automated system can run through 500 carats of stones at once.
Company to provide diamond valuations for consumers trading stones.
Anna Martin to "broaden and deepen GIA's relationships with clients".
Changes create greater purchasing flexibility for non-Sightholders.
Angolan government plans to increase production by 20% to 10m carats.
Rough ruby and corundum gems sold in Singapore for US$18 per carat.
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