London Blue Topaz: The Deep Teal Gem Everyone Asks About

Of all the blue gems, none delivers more presence per dollar than London blue topaz — the deep, inky teal that reads almost like a dark sapphire in evening light. It has become one of the most requested stones in modern jewellery, and for good reason.

London, Swiss or sky blue?

Blue topaz comes in three recognised shades. Sky blue is pale and airy; Swiss blue is bright, electric and tropical; London blue is the deepest of the three — a saturated teal-blue with a moody, sophisticated character. The names describe colour only; all three are genuine topaz.

Why jewellers love it

• Durability. At 8 on the Mohs scale, topaz comfortably handles daily wear in rings and bracelets.
• Clarity. Topaz grows exceptionally clean — expect a glassy, eye-clear stone even at large sizes.
• Value. London blue delivers deep, sapphire-adjacent colour at a fraction of sapphire prices — ideal for bold hexagon studs, statement drops and eternity bands.

Styling the deep teal

London blue is spectacular against yellow gold, where the warm metal makes the teal glow; in white gold it turns sleek and contemporary. It pairs naturally with diamonds and sits beautifully alongside the teal sapphires trend — a kindred colour at a different price point.

London blue topaz at Ministry of Gems

Our Lagoon hexagon drops, Monaco princess studs and Wave eternity ring all feature natural London blue topaz, handcrafted in our workshop in 9K–18K gold. Explore earrings and rings, or enquire about a bespoke London blue commission.

Continue your gem education

Birthstones by Month · How to Buy Opals · Black Opal · browse all Gem Guides — or explore loose gemstones.

This article is part of our Sapphire Guide series — continue with the Sapphire Colour Guide, Origin Guide, Treatments & Heating Guide and Sapphire Price Guide.