Natural Ruby 0.15ct Oval Heated Siam

A natural oval-cut ruby from Siam (Thailand), weighing 0.15 carats and measuring 4x2.8mm. The small oval faceted outline shows a deep red body color characteristic of heated Thai material - a slightly garnet-modified red that is a recognized signature of Siamese ruby. Transparent with SI clarity, the color is vivid and well-saturated for a stone of this small size, and shows confidently through the polished oval face.

Siam is the historical designation for Thailand, used in gemological documentation to identify Thai-origin ruby. Thailand's Chanthaburi and Kanchanaburi provinces were historically significant ruby mining regions, known for producing material with a deep, distinctively darker red compared to the brighter pinkish-reds of some African origins. At 4x2.8mm and 0.15ct, this is a small accent stone suited for micro-setting positions, delicate accent work, and collectors interested in labeled historic-origin ruby.

• Stone type: Natural ruby (corundum)
• Treatment: Heated
• Cut/Form: Oval faceted
• Size: 4x2.8mm
• Weight: 0.15ct
• Clarity: SI
• Origin: Siam (Thailand)

Natural Siam ruby, heated, July birthstone - sold loose.