The Collection

Every stone has a story.

Sourced directly from mines across four continents, each piece in our inventory carries a provenance. Browse by category, or contact us for stones not listed.

Precious

Colombian Emerald

Muzo, Colombia

Vivid green with the characteristic jardin inclusions that authenticate Colombian origin. Exceptional clarity for the type.

Unheated · Natural · GIA certifiable

Precious

Burmese Ruby

Mogok, Myanmar

Pigeon's blood red — the most coveted color in the ruby world. Direct from our Mogok sourcing partners.

Unheated · Natural · AGL certifiable

Precious

Ceylon Sapphire

Ratnapura, Sri Lanka

Cornflower blue with exceptional brilliance. Sri Lanka remains the world's finest source for blue sapphires.

Unheated · Natural · GIA certifiable

Semi-Precious

Paraíba Tourmaline

Paraíba, Brazil

Neon blue-green with the unmistakable copper-driven luminosity that makes Paraíba the rarest tourmaline on earth.

Natural · GRS certifiable

Semi-Precious

Labradorite

Tulear, Madagascar

Spectacular labradorescence — shifting blues, golds, and greens across the surface. Exceptional spectral display.

Natural · Cabochon ready

Semi-Precious

Zambian Amethyst

Lusaka, Zambia

Deep Siberian-grade purple with exceptional saturation. Zambian material consistently outperforms Brazilian in depth of color.

Natural · Facet grade

Semi-Precious

Tanzanite

Merelani Hills, Tanzania

Trichroic blue-violet with the velvety depth that only Merelani material delivers. Found in one place on earth.

Unheated · Natural · GIA certifiable

Lapidary Rough

Alexandrite Rough

Hematita, Brazil

Color-change chrysoberyl rough — green in daylight, red under incandescent. Exceptional color shift for the discerning cutter.

Natural · Cutter's selection

Lapidary Rough

Tourmaline Crystal

Minas Gerais, Brazil

Terminated multicolor tourmaline crystals — watermelon, rubellite, and indicolite in a single specimen. Museum and cutter quality.

Natural · Specimen & facet grade

Don't see what you need?

Our full inventory is never fully listed. If you're looking for a specific stone, origin, or quantity — reach out. We likely have it, or know where to find it.

Contact Us
Rieth Gems Co.

Mine to gem. Worldwide sourcing, Miami-based. Serving the trade since the source.

Sourcing Regions

  • Colombia — Emeralds
  • Burma / Myanmar — Rubies
  • Sri Lanka — Sapphires
  • Brazil — Tourmaline & Amethyst
  • Madagascar — Labradorite
  • Zambia — Emeralds
  • Tanzania — Tanzanite

Miami Showroom

Rieth Gems Co.Miami, FloridaUnited States

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Precious & Semi-Precious Stones · Lapidary · Worldwide Sourcing