20.53ct Natural Unheated Blue Sapphire Cushion Cut Srilanka SAP 01

A Monumental Treasure: 20.53ct Unheated Blue Sapphire

Witness the sheer scale and beauty of one of nature’s most impressive creations. This 20.53-carat Natural Blue Sapphire is a "titan" in the world of gemstones. While most large sapphires require heat treatment to achieve desirable color, this specimen is completely unheated, retaining its natural "Purplish Blue" hue exactly as it was formed deep within the earth.

Certified Rarity & Natural Integrity

Accompanied by a Royal Serendib Gem Testing Laboratory (RSGTL) report, this sapphire is confirmed to be Natural Corundum with no indications of thermal treatment. The presence of natural "silk" and needle-like inclusions is the hallmark of its untreated origin, proving its authenticity to collectors and investors alike.

Commanding Presence & Exquisite Cut

Weighting in at a massive 20.53 carats, this stone possesses a commanding presence. It features a Rectangular Cushion shape with a Mixed Cut, designed to maximize both its weight retention and its deep, velvety brilliance. With dimensions of 16.98 x 12.65 mm, it is an ideal candidate for a world-class statement piece or a centerpiece in a private collection.

Specifications at a Glance:

• Species: Natural Corundum
• Variety: Natural Blue Sapphire
• Weight: 20.53 Carats
• Dimensions: 16.98 x 12.65 x 10.05 mm
• Color: Purplish Blue
• Shape: Rectangular Cushion
• Cut: Mixed Cut
• Treatment: No Heat (No indications of thermal treatment)
• Certification: RSGTL Report #RSGTL75662026
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An Elite Investment Asset

Large, unheated sapphires over the 20-carat threshold are legendary for their rarity and value retention. This stone represents a "blue-chip" asset for those looking to diversify their portfolio with high-quality tangible assets. It is perfect for:

• Museum-Grade Collections: A definitive example of high-carat natural sapphire.
• Bespoke High Jewelry: A centerpiece for a once-in-a-lifetime necklace or statement ring.
• Investment Portfolios: A rare, non-heated gem that stands the test of time.

Secure this 20-carat natural wonder today. In the world of fine gemstones, a certified unheated sapphire of this size is a once-in-a-generation discovery.