コレクション: 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
通常価格 $1,000.00 USD通常価格単価 / あたりセール価格 $1,000.00 USD(≈ $1000.0 USD) -
Red to Pink Ruby Rough Lot - 200 ct (R4/1)
通常価格 $400.00 USD通常価格単価 / あたりセール価格 $400.00 USD(≈ $400.0 USD) -
Red to Pink Ruby Rough Lot - 700 ct (R4/2)
通常価格 $1,400.00 USD通常価格単価 / あたりセール価格 $1,400.00 USD(≈ $1400.0 USD) -
Pink-Lilac Ruby Rough - 167 ct (R4/6)
通常価格 $335.00 USD通常価格単価 / あたりセール価格 $335.00 USD(≈ $335.0 USD) -
Yellow to Gold Sapphire Rough - 200 ct (R16/2)
通常価格 $6,000.00 USD通常価格単価 / あたりセール価格 $6,000.00 USD(≈ $6000.0 USD) -
Yellow-Gold and Orange Sapphire Rough - 115 ct (R16/4)
通常価格 $3,450.00 USD通常価格単価 / あたりセール価格 $3,450.00 USD(≈ $3450.0 USD) -
Yellow-Orange Sapphire Rough - 200 ct (R16/3)
通常価格 $6,000.00 USD通常価格単価 / あたりセール価格 $6,000.00 USD(≈ $6000.0 USD) -
Yellow to Gold Sapphire Rough - 105 ct (R16/5)
通常価格 $3,150.00 USD通常価格単価 / あたりセール価格 $3,150.00 USD(≈ $3150.0 USD) -
Yellow to Gold Sapphire Rough - 20.4 ct (R16/6)
通常価格 $600.00 USD通常価格単価 / あたりセール価格 $600.00 USD(≈ $600.0 USD) -
Pink-Lilac Ruby Rough - 150 ct (R4/5)
通常価格 $300.00 USD通常価格単価 / あたりセール価格 $300.00 USD(≈ $300.0 USD) -
Pink-Lilac Ruby Rough - 100 ct (R4/4)
通常価格 $200.00 USD通常価格単価 / あたりセール価格 $200.00 USD(≈ $200.0 USD) -
Earthy-Red Ruby Rough - 550 ct (R3/2)
通常価格 $1,100.00 USD通常価格単価 / あたりセール価格 $1,100.00 USD(≈ $1100.0 USD) -
Red-Orange Chalcedony Rough - 1,500 ct (R17/4)
通常価格 $450.00 USD通常価格単価 / あたりセール価格 $450.00 USD(≈ $450.0 USD) -
Orange-to-Red Chalcedony / Carnelian Rough Lot - 3,200 ct (R17/1)
通常価格 $960.00 USD通常価格単価 / あたりセール価格 $960.00 USD(≈ $960.0 USD) -
Orange-to-Red Chalcedony Lot Rough - 3,000 ct (R17)
通常価格 $900.00 USD通常価格単価 / あたりセール価格 $900.00 USD(≈ $900.0 USD) -
Orange Red Pink Chalcedony Lot Rough - 3,400 ct (R17/2)
通常価格 $1,020.00 USD通常価格単価 / あたりセール価格 $1,020.00 USD(≈ $1020.0 USD)















