Sapphire crystal
Sapphire crystal
  • Load image into Gallery viewer, Sapphire
  • Load image into Gallery viewer, Sapphire crystal
  • Load image into Gallery viewer, Sapphire crystal
  • Load image into Gallery viewer, Sapphire


J N Gems
Regular price
Sale price
Regular price
Sold out
Unit price
Shipping calculated at checkout.

Weight (carat):
Size: 1 mm
Shape and Cut:
Origin: Sri lanka


  Sapphires Mother Rock Over 300KG

This exceptional specimen, weighing over 300 kg, is a rare and magnificent natural corundum crystal from the famed Rathanapura Gem Mine in Sri Lanka. Known for producing some of the world's finest sapphires, this mother rock showcases the stunning beauty and geological significance of Ceylon sapphires.

Geological Significance

Origin:Rathanapura, also known as the "City of Gems," is renowned for its rich gem deposits. It is located in the Sabaragamuwa Province of Sri Lanka, a region celebrated for its high-quality sapphire production.
Composition: The primary mineral in this specimen is corundum, an aluminum oxide (Al₂O₃) that ranks 9 on the Mohs scale of hardness, making it one of the hardest minerals on Earth. Sapphires are a variety of corundum, typically exhibiting a blue hue due to the presence of trace elements like iron and titanium.

Physical Characteristics:

Weight:Over 300 kg
Size  The dimensions of this massive corundum crystal highlight the incredible size and quality of the material sourced from this region.
Color: While the exterior may appear rugged and unassuming, the interior of such mother rocks can contain medium blue sapphires, varying from light blue to deep royal blue.

Extraction and Significance:

Mining Process: Extracting such a large specimen requires careful and skilled mining techniques to preserve the integrity of the crystal. This process highlights the expertise of miners in Rathanapura.
Economic Value: Ceylon sapphires are highly prized in the global gemstone market. Their exceptional clarity, color, and size make them desirable for both collectors and jewelers.
Cultural Importance: Sapphires from Sri Lanka hold a historical significance, being treasured by royalty and gem enthusiasts for centuries. They symbolize wisdom, virtue, and good fortune.


This 300 kg mother rock is not only a testament to the natural beauty and geological richness of the Rathanapura region but also an emblem of the enduring legacy of Ceylon sapphires in the gemstone world. It represents the pinnacle of natural sapphire formation and the meticulous effort required to unearth such treasures.