Star Gemological Laboratory – SGL

Welcome To Star Gemological Laboratory




Diamonds and gemstones of similar appearance can have important differences in value. An SGL Certificate clearly discloses the details of any item it accompanies, providing confidence for both buyer and seller.

The value of a precious stone is determined by its gemological makeup, natural rarity and finished quality. Diamonds and gemstones of similar appearance can have important differences in value. Even experts need powerful analytic tools to detect synthetics, treatments and enhancement processes.

With more locations around the globe than any other laboratory, SGL is the world's most trusted name for the expert and impartial grading of diamonds, gemstones and jewelry.

All Diamond Description

Indraneela or Blue Sapphire is known for its striking lustre and color which range from light to very dark blue. Blue Sapphires may be given a variety of cuts; the most common being the oval cut. Bule Sapphires sre ine of the most highly prized of the corundum species.

Mukta or Pearl is the most valued of the organic gems. A Pearl is a very Special & Exclusive gift of nature considered universally as the oldest known gem. The most valued come from the ocean and have a visible luster or sheen with being white vor cream with a rose overtone

Manikya or Ruby, the rarest of gemstone, is a Red Sapphire and often regarded as the king of gems. Rubies vary in color & brighten in Strong light. Some rubies are pinkish red or violet/purplish red in color, with different color & shades of color often found in the same stone

Pushparaga / Pukhraj or yellow sapphire is a lesser known gem in today's market. Known as Oriental topaz until the mid-1800's Colors vary from light yellow to golden and honey yellow. They have considerable lusre, come in a variety of cuts and are increasing in market value.