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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Red-Pink-Violet Ruby Rough - 600 ct (R1/1) - Sold in 20g units
Regular price $1,000.00 USDRegular priceUnit price / perSale price $1,000.00 USD(≈ $1000.0 USD) -
Red to Pink Ruby Rough Lot - 200 ct (R4/1)
Regular price $400.00 USDRegular priceUnit price / perSale price $400.00 USD(≈ $400.0 USD) -
Red to Pink Ruby Rough Lot - 700 ct (R4/2)
Regular price $1,400.00 USDRegular priceUnit price / perSale price $1,400.00 USD(≈ $1400.0 USD) -
Pink-Lilac Ruby Rough - 167 ct (R4/6)
Regular price $335.00 USDRegular priceUnit price / perSale price $335.00 USD(≈ $335.0 USD) -
Yellow to Gold Sapphire Rough - 200 ct (R16/2)
Regular price $6,000.00 USDRegular priceUnit price / perSale price $6,000.00 USD(≈ $6000.0 USD) -
Yellow-Gold and Orange Sapphire Rough - 115 ct (R16/4)
Regular price $3,450.00 USDRegular priceUnit price / perSale price $3,450.00 USD(≈ $3450.0 USD) -
Yellow-Orange Sapphire Rough - 200 ct (R16/3)
Regular price $6,000.00 USDRegular priceUnit price / perSale price $6,000.00 USD(≈ $6000.0 USD) -
Yellow to Gold Sapphire Rough - 105 ct (R16/5)
Regular price $3,150.00 USDRegular priceUnit price / perSale price $3,150.00 USD(≈ $3150.0 USD) -
Yellow to Gold Sapphire Rough - 20.4 ct (R16/6)
Regular price $600.00 USDRegular priceUnit price / perSale price $600.00 USD(≈ $600.0 USD) -
Pink-Lilac Ruby Rough - 150 ct (R4/5)
Regular price $300.00 USDRegular priceUnit price / perSale price $300.00 USD(≈ $300.0 USD) -
Pink-Lilac Ruby Rough - 100 ct (R4/4)
Regular price $200.00 USDRegular priceUnit price / perSale price $200.00 USD(≈ $200.0 USD) -
Earthy-Red Ruby Rough - 550 ct (R3/2)
Regular price $1,100.00 USDRegular priceUnit price / perSale price $1,100.00 USD(≈ $1100.0 USD) -
Red-Orange Chalcedony Rough - 1,500 ct (R17/4)
Regular price $450.00 USDRegular priceUnit price / perSale price $450.00 USD(≈ $450.0 USD) -
Orange-to-Red Chalcedony / Carnelian Rough Lot - 3,200 ct (R17/1)
Regular price $960.00 USDRegular priceUnit price / perSale price $960.00 USD(≈ $960.0 USD) -
Orange-to-Red Chalcedony Lot Rough - 3,000 ct (R17)
Regular price $900.00 USDRegular priceUnit price / perSale price $900.00 USD(≈ $900.0 USD) -
Orange Red Pink Chalcedony Lot Rough - 3,400 ct (R17/2)
Regular price $1,020.00 USDRegular priceUnit price / perSale price $1,020.00 USD(≈ $1020.0 USD)















