Discover the rare and mesmerising beauty of natural Star Sapphire gemstones at Luster Blue. Celebrated for their striking star-like phenomenon, known as asterism, these gemstones display a distinct six-rayed (and occasionally twelve-rayed) star that glides smoothly across the surface under light.

Our curated collection includes Blue Star Sapphires, Star Rubies, and other naturally occurring coloured Star Sapphires, carefully selected for strong asterism, attractive body colour, and overall clarity. Sourced primarily from Ceylon (Sri Lanka) and other renowned origins, each gemstone is expertly shaped as a cabochon to maximise the sharpness and visibility of its star.

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Star Sapphire is one of the most distinctive and collectible varieties of sapphire, formed by the presence of fine rutile inclusions aligned within the crystal structure. At Luster Blue, we focus exclusively on natural, untreated Star Sapphires, ensuring their optical phenomenon remains authentic and naturally formed.

These gemstones are highly valued for bespoke jewellery, statement rings, and collector pieces, offering both visual intrigue and lasting durability. Each Star Sapphire in our collection is responsibly sourced, accurately described, and selected to meet high standards of quality and authenticity.

Explore our Star Sapphire collection to experience the captivating play of light and the timeless rarity that make natural Star Sapphire a truly exceptional gemstone.