Products/Services

GSI is a full-service lab for the global diamond and colored stone trade.

With extensive operations on four continents – North America, Europe, Asia and Africa– we provide a  range of consumer-friendly grading reports, as well as client support, education, and value-added services such as laser inscription and metal engraving.

  • GSI offers several grading reports to meet client needs for different levels of format, detail and price.  Each report includes educational materials to help consumers understand the information in the context of  personal jewelry and diamond purchases.

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  • Metal engraving is performed on a piece of precious metal jewelry, usually for trade identification purposes. GSI clients often choose to engrave an SKU, logo, report number or style number to identify their merchandise. For high-end jewelry pieces, customers may choose to engrave initials or important dates (such as anniversaries) on the metal portion of the jewelry, after consulting with a professional jeweler.

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  • Laser technology allows us to safely inscribe almost anything on a diamond or colored gemstone, from personal messages to brand names, grading report numbers, bar codes and even photographs. In addition to personalizing a gemstone, micro-laser inscription facilitates identification for security and tracking purposes.

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  • VirtualVault™ is an innovative consumer security service created by GSI to increase the accessibility and protect the integrity of GSI Grading Reports. This service is available exclusively to GSI customers residing in the USA who purchase gemstones, diamonds and jewelry with GSI reports.

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  • For the convenience of our clients in the jewelry trade, GSI has developed an industry-leading online certificate tracking system!

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