Natural & Certified Diamonds

Every stone we sell has already earned its brilliance.

We source, grade and set natural diamonds under GIA standards — nothing leaves our vault without a full provenance record.

Colored Gemstones

Rubies, emeralds & sapphires, chosen for depth of color.

Our gemologists reject far more stones than we buy. What reaches the case is saturated, clean and honestly represented.

Emerald Collection

Green, the color the earth keeps for itself.

From rough to finished cut, we track every emerald in our collection back to its mine of origin.

Sapphire Collection

Cut to hold light the way the ocean holds a horizon.

Unheated and heat-treated sapphires available, always disclosed, always documented.

Gold, Silver & Rare Ore

Precious metal, weighed and priced in the open.

Gold, silver ore and mineral specimens for collectors, investors and fellow geoscientists.

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Who We Are

A family gem house built on grading you can verify — not just trust.

K2 Gems & Minerals is an independent dealer of natural diamonds, colored gemstones, gold and mineral specimens, based in Modesto, California. Founded by Mr. Kablanow, the company works directly with cutters, mines and certified laboratories so every stone we offer arrives with a documented history.

Read our story

Years appraising & dealing gemstones

Carats sourced & certified to date

Private & trade clients served

Of stones sold with full disclosure

The Collection

Six ways the earth makes something worth keeping.

From Earth To Ledger

We follow the geology before we follow the price.

Every parcel that reaches K2 Gems & Minerals is evaluated the way a geoscientist would evaluate a deposit — origin, formation, and the conditions the stone survived to reach us. Our buyers work with vetted mining partners and independent labs to confirm what a piece is before it ever earns a price tag.

Origin-Traced

Mine-to-market documentation on request

Lab-Verified

Independent grading before every sale

"I was taught to grade a stone before I ever priced one. That order still runs everything we do at K2 — the certificate has to be earned before the sale is made."

Mr. Kablanow founded K2 Gems & Minerals to bring the discipline of formal gemology to everyday buyers — collectors, jewelers and first-time investors alike. He personally reviews every diamond above one carat before it is listed.