Natural London Blue Topaz

London Blue Topaz, Natural London Blue Topaz, Genuine London Blue Topaz

Real London Blue Topaz – Genuine London Blue Topaz – Natural London Blue Topaz

Topaz is mined from several countries around the world. Blue colored natural topaz is very rarely found. Thedark, greyish blue coloration, or “London blue”, of these natural topaz gemstones results from a standardized radiation treatment that requires 3-4 years to produce the deep blue coloration.

COLOR: London blue topaz is a medium to dark greyish blue, sometimes described as “steely” or “inky”.

ORIGIN: Brazil, Afghanistan, Australia, Myanmar (Burma), China, Germany, Japan, Madagascar, Mexico, Namibia, Nigeria, Pakistan, Russia, Zimbabwe, Sri Lanka, Ukraine and the USA.

CHEMICAL COMPOSITION:  Al2SiO4(F,OH)2 Fluor containing aluminium silicate

CUT: Round, Oval, Pear, Square, Emerald, Marquise, Trillion, Heart


REFRACTIVE INDEX: 1.609 – 1.643


FORMATION:  Topaz is exposed to radiation (a process known as irradiation) and then usually heated, to produce striking blue colors. A deep blue enhanced topaz is known as “London blue”

BIRTHSTONE: London Blue Topaz is the traditional birthstone for December.

UNUSUAL PROPERTIES: London Blue Topaz Stones will heighten your ability to communicate better, and to express yourself in a meaningful way when speaking or when writing.

TREATMENT: London blue topaz is typically produced by exposure to radiation in a nuclear reactor. When topaz is exposed to fast neutrons, the radiation changes the color centres, producing the deep blue color. Subsequent heat treatment is often used to lighten the inky color. Material treated in this way is likely to be radioactive and may require several months of storage before the radioactivity decays to safe levels.

USAGE: Rings, necklaces, bracelets and pendants

WHAT WE SUPPLY: Best quality London Blue Topaz in above mentioned Cut in different sizes.

We offer Blue Topaz in three shades

Natural London Blue Topaz

Natural Swiss Blue Topaz

Natural Sky Blue Topaz


Please select one of the following shapes to see the prices

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