11.68ct Black Australian Sapphire Unheated
Gem Type: Natural Sapphire Corundum
Colour: Greenish-Blue
Carat Weight: 11.68
Shape: Emerald Cut
Crown Cut: Step
Pavilion Cut: Step
Clarity: Eye Clean
Treatment: Unheated
Measurements: 15.22 x 9.37 x 7.65mm
Origin: Australia
Lab Certification: GFCO Gem Lab
This 11.68ct Greenish Blue Australian Sapphire was sourced as rough and cut in house by The Sapphire Merchant.
The stone has an exceptionally dark, almost black appearance, with deep green and blue tones visible beneath its surface. Under stronger lighting, these colours become more apparent, revealing the natural character hidden within this substantial sapphire.
Its large emerald cut gives the stone a bold, architectural presence, with broad step-cut facets and clean geometric lines. The darker tone suits its imposing size, creating a gemstone that feels quite different from the bright, conventional sapphires more commonly seen in fine jewellery.
At 11.68ct, this is an impressive example of Australian sapphire, particularly for someone seeking a very large, natural and unheated gemstone. Its unusual combination of size, dark colour, and distinctive cutting makes it an interesting choice for a statement ring, pendant, or bespoke jewellery design.
Buy this natural unheated Australian sapphire as a loose gemstone or custom design a jewellery piece with The Sapphire Merchant.
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Estimated Delivery:Oct 21 - Oct 25
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11.68ct Black Australian Sapphire Unheated
Create Your Perfect Ring
- Select your Gemstone. Purchase through our website and begin your custom jewellery experience.
- Share your design idea. We will work through the details with you to better visualise your concept, including the ring style, gold colour, and diamond detailing. We can also make earrings and pendants. Our talented designer creates a life-like computer-rendered drawing of your jewellery concept from this information. Edits can be made to perfect the design and a quote is given upon the finalised design.
- We will craft your custom ring. You will receive a beautiful custom jewellery box, along with certifications and reports verifying the quality and authenticity of your piece.
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“The sapphire is the most beautiful of all blue stones, and the most sovereign for the eyes.” - Anselmus de Boodt, 1609 (Royal gem physician to Rudolph II)
Australian Sapphires
Australian sapphires are prized across Australia and New Zealand because they are unearthed from the red soil beneath us. Mined from the historic sapphire fields of New South Wales and Queensland, including Inverell, Glen Innes, and Anakie, these natural sapphires display a rich spectrum of deep blue, teal, green, yellow, and the highly sought-after Australian parti sapphire. Formed in basalt lava flows millions of years ago, Australian sapphires are renowned for their inky colour saturation, making them an ideal choice for engagement rings and custom sapphire designs.
Commercial sapphire mining in Australia began in the late 1800s, with the country becoming one of the world’s leading sapphire producers throughout the 20th century. Today, Australian sapphire mining is heavily regulated, with strict environmental management and land rehabilitation standards in place, a key consideration for ethically minded jewellery buyers in Australia and New Zealand. Valued for their ethical sourcing, durability, and bold natural colour, Australian sapphires remain a favourite among custom jewellery clients across Australasia seeking gemstones of integrity and enduring beauty.