https://sahlgems.com/blog Sapphire buying, treatment, certification and trade insight from Sahl Gems. en https://sahlgems.com/blog/sapphire-certification-explained https://sahlgems.com/blog/sapphire-certification-explained GIA, SSEF, Gübelin, GRS, AGL — what each sapphire laboratory report tells you, when certification is worth the cost, and how origin and treatment calls actually get made. Tue, 09 Jun 2026 00:00:00 GMT https://sahlgems.com/blog/teal-sapphires-buying-guide https://sahlgems.com/blog/teal-sapphires-buying-guide Teal sapphire has become one of the most in-demand colours in bridal design. How to judge the blue-green balance, why zoning matters, and what to expect on treatment and price. Thu, 28 May 2026 00:00:00 GMT https://sahlgems.com/blog/heated-vs-unheated-sapphires https://sahlgems.com/blog/heated-vs-unheated-sapphires Heat treatment is legitimate and widespread — the real issue is disclosure. A practical guide to heated and unheated sapphires, price impact, and how to verify treatment before you buy. Tue, 12 May 2026 00:00:00 GMT