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. A natural blue topaz birthstone is very rarely found. The dark, greyish blue coloration, or “London blue,” of these natural blue topaz birthstones results from a standardized radiation treatment that requires 3-4 years to produce the deep blue coloration.

COLOR: Natural 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: Topaz London blue is the traditional birthstone for December, made up of Aluminium and fluorine, silicate minerals.

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. This precious stone is fragile and brittle, with a sheen akin to glass and a profound cleavage. You can find blue topaz birthstones in dark to cool blues, also called Sky Blue, London Blue, or Swiss Blue, depending on the intensity of the hue.

TREATMENT: Topaz London blue 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.

Wear London blue topaz to promote emotional well-being, as its calming blue color varies according to the wearer’s mood.

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 birthstones in three shades.

Natural London Blue Topaz

Natural Swiss Blue Topaz

Natural Sky Blue Topaz

Gems n gens is one of the most reliable sources for certified natural & lab created London blue topaz birthstones in Bangkok, Thailand. We have completed almost thirteen glorious years dealing with a wide variety of premium quality natural & synthetic gemstones in various colors, sizes & patterns.


Please select one of the following shapes to see the prices

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