Pink, red and purple diamonds, the rarest and most valuable diamonds on the planet, have recently seen an increase in prices. The 23rd Annual Argyle Pink Diamond Tender had a variety of exotic and unusual stones suitable for any aspiring gemstone collector. Many avid gemstone collectors spurred high bids for these precious colored gemstones. Prices on such stones can reach about $400,000 – $500,000 per carat to the wholesaler.

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