Brazilian London Blue Topaz Necklace｜5 Cuts · November Birthstone

SMUK is proud to launch a necklace featuring Brazilian London Blue Topaz, now live on Makuake.

Among blue topaz, the deepest blue is "London Blue" — a rich, clear blue reminiscent of the London night sky. We use topaz from Brazil, the world's leading source for the stone.

Topaz is Mohs hardness 8 — scratch-resistant and well suited to everyday wear. High clarity and sharp, faceted brilliance let a quiet light shimmer within the deep blue at your décolleté.

Five Cuts to Choose From

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PEAR (7×5mm)

A teardrop shape. The blue flows toward the point, and the vertical line makes the neckline look longer.

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OVAL (7.5×5.5mm)

A soft curve that wraps the depth of the blue. The largest of the five cuts, with plenty of presence at the neckline.

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SQUARE (6.5mm)｜Necklace & Earrings

A sharp, modern square. The symmetrical, refined shape is a subtle accent to simple styling. Matching earrings also available.

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ROUND (5mm)｜Necklace & Earrings

A round shape that gathers light — timeless and never dull. The smallest of the five, just right for understated everyday wear. Matching earrings too.

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TRILLION (6.5mm)

A rare triangular cut you don't often see. It looks larger for its size, with strong presence — for those seeking a piece no one else has.

Details We Care About

Available exclusively on Makuake during the campaign period.

Be sure to visit the project page while it's live.