Opal
Cats Eye
Zircon
Ruby
Peridot
Tourmaline
Tanzanite
Citrine
Quartz
Chrysoberyl
Sapphire
Aquamarine
Garnet
Amethyst
Topaz
Sinhalite
Alexandrite
Spinel
Emerald
Lolite
Padparadscha
Guide
Emerald
Green beryl prized for color first. Learn hardness, refractive index, typical treatments, and how to shop with confidence.
Seylan Gems & Jewelry
Short original education on the stones we sell — specs treatments and practical buying notes — then shop estimate carat or book a consult.
Start here
Each guide includes a specs table aligned with our carat tool treatment notes and links into the live catalog.
Guide
Green beryl prized for color first. Learn hardness, refractive index, typical treatments, and how to shop with confidence.
Guide
Corundum beyond red. Ceylon blues, heat treatment norms, and how SG ~4.00 ties into carat estimates.
Guide
Red corundum: hardness 9, SG ~4.00, heat norms, and what “pigeon’s blood” talk really means for buyers.
Next steps
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