A truly exceptional 72.92 carat London Blue Topaz, notable for its remarkable scale, elegant emerald cut, and refined denim-blue colour. Sourced from a retired jeweller’s collection and dating to approximately the 1970s, this is a striking statement gemstone with both presence and provenance.
Cut in a classic emerald form, the stone displays broad, open facets that emphasise its excellent clarity and create a calm, glass-like brilliance. Unlike smaller, highly sparkly stones, this piece offers a more sophisticated, architectural beauty—highly prized in bespoke jewellery design.
The colour is a beautifully balanced medium London blue, sitting between deep inky tones and brighter Swiss blues. This softer denim hue is particularly versatile, working seamlessly in both yellow and white metal settings.
Weighing an impressive 72.92 carats, this gemstone is far larger than typically encountered in finished jewellery and is ideally suited for a bold custom ring, pendant, or collector’s piece. Stones of this scale are rarely seen outside of specialist jeweller inventories.
Tested using a Presidium Gem Tester and confirmed as topaz. A rare opportunity to acquire a gemstone of this scale at a fraction of the cost of comparable custom-cut stones.
MEASUREMENTS
Weight: 72.92 carats
Dimensions: 25.95mm x 18.29mm
Depth: 13.10mm
CONDITION
Internally clean and in very, very good condition.
Under close magnification, there are a few tiny nibbles to the facet edges—minor and entirely consistent with age and scale, with no impact on beauty or structural integrity.
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ADDITIONAL INFORMATION
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Materials: London Blue Topaz.