Loose Siam-Thailand Gemstones

Siam-Thailand gemstones carry a royal legacy with their distinctive color profiles and historical significance. Our collection features authentic Thai treasures – from classic "Siamese" rubies to rare black star sapphires – each selected for its unique saturation and optical phenomena that have made these gems favorites among collectors for centuries.
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Gem type

Gem type

Color

Color

Shape

Shape

Diamond shape refers to the overall outline and facets of a diamond. It’s a crucial factor that affects a diamond’s brilliance, fire, and scintillation – its ability to reflect light and sparkle.

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Origin

Origin

Treatment

Treatment

Carat weight

Carat weight

Diamond weight, also known as carat weight, is a measure of a diamond’s mass. It’s one of the four Cs (carat, cut, clarity, and color) that determine a diamond’s value and price.

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2 items

2.60 Oval Shape Thailand Ruby CGL

10,800.00$

9.38 Heart Shape Thai-Siamese Blue Sapphire

24,900.00$

FREQUENTLY ASKED QUESTIONS

What distinguishes Thai/Siamese rubies from those of other origins?

Thai rubies typically display a distinctive garnet-like red with subtle brown or purple undertones that creates a unique aesthetic different from Burmese or African specimens. Their exceptional durability and typically excellent clarity make them particularly suitable for everyday jewelry pieces. Natural Thai rubies offer outstanding value compared to Burmese stones, with GIA-certified, conflict-free specimens representing excellent investments for collectors seeking quality at more accessible price points.

Why are Thai sapphires considered excellent value in the marketplace?

Thai sapphires offer exceptional clarity and durability with attractive blue hues that provide excellent value compared to Kashmir or Burmese specimens. Their consistent quality and substantial size availability make them practical choices for significant jewelry pieces. Premium-quality, untreated Thai sapphires with proper certification represent genuine value for collectors seeking fine colored stones without the extreme premiums commanded by more famous origins.

How has Thailand's gemstone industry contributed to global standards?

Thailand has developed world-class cutting and treatment expertise that has established global benchmarks for gemstone enhancement disclosure and quality standards. This technical leadership has created greater transparency throughout the international precious stone market. Thailand’s commitment to ethical practices has generated improved documentation standards now adopted worldwide, ensuring purchasers can confidently acquire genuine, high-quality gemstones with complete information about their characteristics and treatments.