A Masterpiece of Rare Beauty
Discover an extraordinary 18K white gold necklace adorned with 175 carats total weight of VS diamonds and sapphires, crafted for the finest jewelry collections.
Alpha GemstoneYour complete gemstone source
Any gemAny sizeAny shapeOne source
From ½ mm melee to rare collector gemstones — virtually every color, shape, size and price point.
Serving jewelers, designers, collectors & gemstone buyers since 1988
Shape
Color
Type a gem, shape, size or SKU above, or choose a category, shape or color, to see matching products.
Delivering authentic gemstones across the world
From rare gemstones to fine jewelry, we ship our collections securely to customers across three continents, with trusted international logistics partners handling every leg of the journey.
Global Shipping
Fast, tracked delivery from our New York hub to 100 countries.
Certification Available
Laboratory reports accompany applicable diamonds and fine gemstones.
Insured Packaging
Fully insured, discreet packaging for high-value items.
Excellence, put in writing
Four commitments we hold ourselves to on every piece — each one as verifiable as the certificate that comes with your stone.
Largest Gemstone Inventory
Over 50,000 coloured gemstones, catalogued and searchable — the stone you want is one search away.
Truly Bespoke
Made to order — your gemstone, your metal, your silhouette. Every detail specified before it’s made.
Best-in-Class Craftsmanship
Set by hand under magnification, by jewellers who’ve cut their teeth on stones worth more than the tools they hold.
Full Transparency
Many diamonds and fine gemstones are accompanied by independent laboratory reports. Certification information is shown on applicable products.
Make Birthdays More Colourful
One source.Thousands of possibilities.
Explore diamonds, precious gemstones, semi-precious stones, jewelry, wholesale lots and hard-to-find sizes — backed by Alpha’s experience since 1988.
Diamonds
Loose stones, matched pairs and melee
Precious gemstones
Ruby, sapphire and emerald
Semi-precious stones
Colored stones in every shade
Jewelry
Finished pieces set in fine gold
Wholesale lots
Parcels priced for the trade
Hard-to-find sizes
From 0.5 mm melee to 13 mm and up
Today's gold & silver rates
While spot price keeps climbing, alpha keeps it low. Compare today's live gold and silver price against our jewelry — in many cases we're priced well under the metal itself.