Collection: Rough & Uncut Gemstones
Directly sourced, naturally authentic
The majority of our rough gemstones are sourced directly, or just one supply chain away, from nearby mines in Thailand, Laos, and Cambodia. We also occasionally offer carefully selected pieces from other gem regions, including Africa. By collaborating exclusively with long-term, verified partners, we ensure authenticity, ethical standards, and exceptional quality.
Short supply chains, lasting value
Our approach reduces supply chain length, supports sustainability, and allows us to offer competitive prices per gram. Each stone is unique, carrying within it the raw beauty of its origin – and sometimes, treasures whose value may surpass expectations.
Rough stones at Siam Gems Club
From single pieces to larger parcels, our rough gems open a world of creative possibilities for collectors, cutters, and designers alike.
Tailored offers and special arrangements
If you are interested in purchasing rough stones in larger quantities or specific lots, please don’t hesitate to contact us. We are happy to provide tailored offers and special arrangements to meet your needs.
Gemological insights
Rough and uncut gemstones are valued for their natural state and potential. Their true beauty often emerges through expert cutting and polishing. To learn more, visit the Gemological Institute of America (GIA).
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Grey-Blue Chalcedony Rough - 2,300 ct (R59)
Regular price $160.00 USDRegular priceUnit price / perSale price $160.00 USD(≈ $160.0 USD) -
Champagne-Gold Topaz Rough - 14,900 Ct (R15/1) - Sold in 40g units
Regular price $240.00 USDRegular priceUnit price / perSale price $240.00 USD(≈ $240.0 USD) -
Yellow to Orange Sapphires Rough - 8,250 ct (R33) - Sold in 20g units
Regular price $320.00 USDRegular priceUnit price / perSale price $320.00 USD(≈ $320.0 USD) -
Yellowish-Green Tourmaline Rough – 4,750 ct (R25/1) – Sold in 20g units
Regular price $80.00 USDRegular priceUnit price / perSale price $80.00 USD(≈ $80.0 USD) -
Lemon Quartz Lot Rough - 1,425 ct (R27)
Regular price $427.50 USDRegular priceUnit price / perSale price $427.50 USD(≈ $427.5 USD) -
Lemon Quartz Rough – 2,800 ct (R27/1) – Sold in 40g units
Regular price $40.00 USDRegular priceUnit price / perSale price $40.00 USD(≈ $40.0 USD) -
Champagne-Gold Topaz Rough - 75 ct (R15/2)
Regular price $15.00 USDRegular priceUnit price / perSale price $15.00 USD(≈ $15.0 USD) -
Purple-Pink Ruby Rough - 1,400 ct (R61)
Regular price $560.00 USDRegular priceUnit price / perSale price $560.00 USD(≈ $560.0 USD) -
Pink-Violet Ruby Rough - 1,600 ct (R62)
Regular price $640.00 USDRegular priceUnit price / perSale price $640.00 USD(≈ $640.0 USD) -
Green Sapphire Rough - 237 ct (R63)
Regular price $144.00 USDRegular priceUnit price / perSale price $144.00 USD(≈ $144.0 USD) -
Green Sapphire Rough - 289 ct (R64)
Regular price $175.00 USDRegular priceUnit price / perSale price $175.00 USD(≈ $175.0 USD) -
Pink-Purplish Ruby Lot Rough - 800 ct (R66)
Regular price $480.00 USDRegular priceUnit price / perSale price $480.00 USD(≈ $480.0 USD) -
Purplish-Pink Ruby Lot Rough - 595 ct (R67)
Regular price $238.00 USDRegular priceUnit price / perSale price $238.00 USD(≈ $238.0 USD) -
Pink to Lilac Ruby Lot Rough - 6,900 ct (R65)
Regular price $1,380.00 USDRegular priceUnit price / perSale price $1,380.00 USD(≈ $1380.0 USD) -
Pale Pink Ruby Rough - 695 ct (R69)
Regular price $278.00 USDRegular priceUnit price / perSale price $278.00 USD(≈ $278.0 USD) -
Pink Ruby Rough in moss-green host rock - 405 ct (R68)
Regular price $243.00 USDRegular priceUnit price / perSale price $243.00 USD(≈ $243.0 USD)















