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 Ruby Rough - 3,300 ct (R1) - Sold in 10g units
通常価格 $500.00 USD通常価格単価 / あたりセール価格 $500.00 USD(≈ $500.0 USD) -
Champagne-Gold Topaz Rough - 1,400 ct (R15) - Sold in 20g units
通常価格 $120.00 USD通常価格単価 / あたりセール価格 $120.00 USD(≈ $120.0 USD) -
Blue Sapphire Plates Rough - 1,060 ct (R13) - Available by Set or Plate
通常価格 $424.00 USD通常価格単価 / あたりセール価格 $424.00 USD(≈ $424.0 USD) -
Deep Blue Sapphire Rough - 2,500 g (R7) - Sold in 5g units
通常価格 $100.00 USD通常価格単価 / あたりセール価格 $100.00 USD(≈ $100.0 USD) -
White Quartz Rough - 3,950 (R14) - Sold in 30g units
通常価格 $45.00 USD通常価格単価 / あたりセール価格 $45.00 USD(≈ $45.0 USD) -
Pink to Purplish Ruby Rough - 4,000 ct (R5) - 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) -
Deep Blue to Yellow Sapphire Rough - 3,925 ct (R11) - Sold in 5g units
通常価格 $150.00 USD通常価格単価 / あたりセール価格 $150.00 USD(≈ $150.0 USD) -
Blue Green Sapphire Rough - 5,000 ct (R10) - Sold in 5g units
通常価格 $75.00 USD通常価格単価 / あたりセール価格 $75.00 USD(≈ $75.0 USD) -
Blue Sapphire Rough - 1,150 ct (R12) - Sold in 10g units
通常価格 $350.00 USD通常価格単価 / あたりセール価格 $350.00 USD(≈ $350.0 USD) -
Rich Red Ruby Rough – 338 ct (R6) – Sold in 5g units
通常価格 $1,250.00 USD通常価格単価 / あたりセール価格 $1,250.00 USD(≈ $1250.0 USD) -
Red Ruby Rough – 3,550 ct (R2) – Sold in 5g units
通常価格 $1,250.00 USD通常価格単価 / あたりセール価格 $1,250.00 USD(≈ $1250.0 USD) -
Pinkish-Red Ruby Rough – 590 ct (R9) – Sold in 5g units
通常価格 $500.00 USD通常価格単価 / あたりセール価格 $500.00 USD(≈ $500.0 USD) -
Pinkish Red Ruby Rough – 500 ct (R8) – Sold in 5g units
通常価格 $500.00 USD通常価格単価 / あたりセール価格 $500.00 USD(≈ $500.0 USD) -
Sky to Greyish Blue Chalcedony Rough - 2,900 ct (R57)
通常価格 $199.00 USD通常価格単価 / あたりセール価格 $199.00 USD(≈ $199.0 USD) -
Sky to Greyish Blue Chalcedony Lot Rough - 850 ct (R56)
通常価格 $66.00 USD通常価格単価 / あたりセール価格 $66.00 USD(≈ $66.0 USD) -
Sky to Greyish Blue Chalcedony Lot Rough - 1,050 ct (R55)
通常価格 $79.00 USD通常価格単価 / あたりセール価格 $79.00 USD(≈ $79.0 USD)















