Our Premium Collection
Browse through our certified gemstones and diamonds, each with detailed testing reports
Natural Burmese Ruby
Premium quality natural ruby from Myanmar with vivid red color and excellent clarity.
Round Brilliant Diamond
Excellent cut diamond with D color and IF clarity, perfect for engagement rings.
Emerald & Diamond Necklace
18K gold necklace with Colombian emeralds and brilliant-cut diamonds.
Ceylon Blue Sapphire
Natural untreated blue sapphire from Sri Lanka with velvety blue color.
Digital Refractometer
Professional gemological refractometer for accurate RI measurements.
Diamond Stud Earrings
Pair of round brilliant diamonds in platinum setting, perfect for daily wear.
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What Our Customers Say
Trusted by gem enthusiasts and professionals worldwide
"The certified ruby I purchased from GTC exceeded my expectations. The certification report was detailed and accurate. Highly recommended for serious gem buyers."
"As a collector, I appreciate the authenticity and detailed documentation provided with each gemstone. GTC's certification gives me complete confidence in my purchases."
"The diamond testing equipment I bought from GTC has been invaluable for my gemological lab. Professional quality and excellent customer support."