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Join date: Sep 6, 2025
About
Rahul Jain is the seventh-generation director of Caram, a family gemstone house founded in Germany in 1975. He advises private collectors, inheritors, and trade buyers on rare colored gemstone valuation, provenance, and bespoke commissions. Rahul completed the Advanced Coloured Gemstone Course at the Swiss Gemmological Institute (SSEF) and the Gübelin Academy Professional Course, and holds an MBA from the Tuck School of Business at Dartmouth and a B.S. summa cum laude from Babson College. Caram has been an Accredited Ethical Member of the International Colored Gemstone Association (ICA) since the association's founding congress in Idar-Oberstein in 1985.
Posts (45)
Oct 6, 2026 ∙ 8 min
Gemstone Origin Reports: Why Two Laboratories Can Disagree
A gemstone origin report is a laboratory's opinion on where a stone formed — supported by inclusions, trace-element chemistry and spectra, but an opinion nonetheless. This is a calm look at how that opinion is reached, why two respected laboratories can disagree about the same sapphire, what the qualifying language on a report is conceding, and how to judge an origin premium when the document hedges.
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Oct 2, 2026 ∙ 3 min
Caram in InColor: The Padparadscha, Sapphire's Rarest and Most Debated Color
InColor Fall 2026 carries Rahul Jain's four-page feature on the padparadscha: where the name comes from, what defines the color, and why experienced gemologists can reach different conclusions about the same stone.
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Sep 7, 2026 ∙ 7 min
Mahenge Spinel: The Modern Collector’s Pink
Spinel from Mahenge, Tanzania changed what collectors expect a pink stone to do. What the name actually promises, what separates a fine Mahenge spinel from a merely bright one, how it stands beside pink sapphire and padparadscha, and why documentation still matters for an untreated stone.
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