blue topaz color chart

Blue Topaz Gemstones’ History, Difference, Meaning and Power..

Before detailing the distinction between the various types of Blue Topaz Gemstones, it’s important to understand what is Blue Topaz exactly?

Meaning of Blue Topaz

blue topaz

No one can explain the meaning of blue topaz better than us. It’s a dream gemstone in our own language if we had to explain the topaz meaning. However, in real the actual meaning is derived from Sanskrit and means “Fire”. There is believed to be an island called Topazos in the red sea near Greece, where a yellow-colored topaz variety used to be mined. Now mainly the yellow ( today known as imperial topaz ) is found in Brazil. Most of the other commercial productions are from Nigeria and brazil with some deposits still found in India, Srilanka, Burma, Russia, Laos.

Topaz can mean a lot of different things for a variety of different people. Topaz meaning for fashion people means affordable gemstone jewelry in this color range. The meaning of topaz for the astrological purpose is to bring post life and positive energy for those who believe in powers and astrology. Topaz for the Hindu religion is the stone of the “Kalpa tree” and is believed to be one of the 9 sacred stones in the religion.

Blue Topaz – General Introduction about this December birthstone (Topaz birthstone)

The Topaz is one of the most popular gemstones in the world along with the Ruby, Diamond and Sapphire. It is available in a wide range of colors but the golden orangish-yellow Topaz known as Imperial Topaz is the most expensive color of all. Topaz in blue color is the most admired member amongst the Topaz family because of its brilliance and striking color. Topaz is also the favorite amongst the texas state as it’s the Texas state gemstone.

Although, the color blue is available with many gemstones like in the darker tones of Sapphires, Tanzanite, Iolite, Lapis Lazuli, Aquamarine and Kyanite, etc. But none of the above-mentioned gemstones are perfect for everyday wearing jewelry such as rings, pendants because they do not possess the perfect hardness as Topaz. This blue-colored Topaz has been rated 8 on Moh’s Scale of Hardness which makes it an outstanding gemstone for daily use. “Colored Stone” – a well-known industry magazine has rated Topaz on the second position amongst all the colored gemstones, Sapphires being at the first position.
blue topaz process from white topaz to blue topaz

Topaz is one of Earth’s hardest naturally occurring gemstones. It develops as a crystal mineral in various granite rocks and lava flows. Topaz, in a natural state, is usually colorless and transparent.  The presence of iron and chromium impurities causes variations in color which ranges from pale yellow, brown, and grey to pastels shades of green, violet, and pink. The most common venues from where Topaz is mined are Germany, The Czech Republic, Italy, Norway, Sweden, Pakistan, Afghanistan, Japan, and Brazil, at specific sites of Texas and Utah as well as in Mexico. Topaz can be found in vast and flawless crystals which can be faceted into giant gemstones that can weigh thousands of carats.

The only natural resources of White Topaz are found in Sri Lanka. It is important to be noted here that the Topaz in natural blue color is very rare to be found. Blue – Topaz traded in the market is produced by giving heat and radiation treatments to the clear Topaz. The methods of the treatment given to clear Topaz to change its color into blue will be discussed later in the article

A Classification into a Topaz color chart

blue topaz color chart
Topaz comes in various colors of blue. Broadly, on the basis of color, it can be classified into three categories. The above Topaz color chart explains everything you need; works as a pocket guide for color reference.

Swiss BT

swiss blue topaz

London BT

London Blue Topaz oval

In case of all topaz in blue color, it is very hard to determine where one color ends and another starts. A simple rule of thumb is applied all over the world i.e. light blue is Sky, medium blue is Swiss and dark blue is London. Topaz is colorless or white quartz, the color blue is the result of various radiation and heat treatments. The color (shade of blue) depends on the type of radiation method used. The several methods of irradiation that are used to alter the color of Clear Topaz are:

Ø By X-rays
By Gamma rays
By Neutrons bombardment
By High-energy charged particles such as electrons and protons.

1. Sky Blue Topaz: Sky Blue comes clean, clear, and delicate blue color just resembles the color of the sky on a cloudless day. It pleases those who like light colors and airy spaces. Technically, Sky blue Topaz is a white topaz that has been exposed to gamma- rays to change the color of the gemstone into light blue.

Sky Blue Topaz

Gemstones are exposed to gamma-rays within a gamma cell containing the radioactive material Cobalt 60 which emits gamma-rays. The rays generated are very penetrating and produce uniform color to the specimen. For producing a Swiss Blue, intense doses of gamma-rays are required for the first 2-3 hours subsequently, the dose can be reduced.

Without a doubt, Sky Topaz is the most affordable gemstone in the market today. Its pleasing and spirit-lifting light blue color gives you the look of Aquamarine but at a very pocket-friendly price tag. The Sky Topaz ranges between 0.50$-2$ per carat. The consumer market of light blue colored topaz is Europe.

2. Swiss Topaz: The vivid color of Swiss Blue Topaz resembles the color of the rich Caribbean Sea which is very close to the color of Brazilian Paraiba Tourmaline.  It is different from Sky Topaz as it darker than sky color and also known as the Electric Topaz. Technically, Swiss Topaz is a white topaz that has been exposed to high energy electrons to change the color to bright, saturated, and cheerful blue.

Swiss Blue Topaz

Linear accelerators are used at high energies to accelerate electrons. The electrons are forced to pass through by an electrically deflected zigzag pattern so the whole specimen holder is exposed to the beam of electrons. This method is complex, expensive to build, expensive to operate, and must be well-shielded. More importantly, the excessive heat produced during the process is a cause of major worry because too much heat can crack the specimen. During this radiation process, the samples are often cooled by running cold water. Due to the low penetration and coloration, there is more heat at the surface. The penetration depth can be increased but it can result in high radioactivity. The only advantage of using this radiation method is that it can produce treated topaz by increasing the doses to tens of thousands of mega-rads. While in the case of gamma-rays to achieve this level of energy it may take several months. The color produced in a linear accelerator is brown and blue.

Swiss Topaz is one of the prettiest and most famous members amongst the Topaz family. It has a vivid blue color which is darker than the color Sky Topaz and lighter than London Topaz. The price starts from 1.5$ per carat. The main consumer markets of Swiss Blue are the U.S.A, Asia, and Europe.

3. London Blue Topaz: London Blue is a white topaz that has been exposed in a nuclear reactor to change the color to a saturated and deep blue. Many of these have a slightly greenish tone when viewed from certain angles.

London Blue Topaz Roough

Neutrons produced in the nuclear reactor can also change the color of pure topaz crystals. They have excellent penetration so, there is no problem with surface heating, and the color produced by neutrons is deep and uniform. The color produced by neutrons is often dark to those produced by electrons. That’s why London Blues are also referred to as ‘Inky’ and ‘Steely’ Topaz.

In the case of blue color, a more saturated blue color tends to have more value because the exact looks like Tanzanite. So, in Topaz the London Blue is regarded as the most valuable amongst the other members of the Topaz family. London Blue Topaz prices start from 2.5$ per carat. The consumer markets of this dark blue stone are Europe, U.S.A., and Australia.

Heat Treatments: Followed by irradiation treatments (either by gamma-rays, neutrons, or electrons ) the treated topaz is heated to reveal the blue color more clearly by removing any yellow or brown color present on the stone. Heating acts as cleaning for the gemstone. Heating should be applied on gemstones very slow and carefully. Because Topaz is heat sensitive and excessive heat can break, chips, or shatter the gemstone. The heating should be done below the temperature of 200 degrees Celsius.

Blue Topaz- The Hidden Controversy you must know about?

In the case of Swiss Topaz and London Topaz, the color has been attained by bombardment from electrons and neutrons in a linear accelerator and nuclear reactor respectively followed by heat treatments. In the year 2007, The American Nuclear Regulatory Commission (NRC) raised the question that is irradiated Blue Topaz is really safe for the public or not?? This statement raised controversy at that time and thus badly affected the demand for Topaz worldwide. But after 2 years of this event, NRC themselves tested around 9 batches of irradiated Swiss and London Topaz of 500 carats each and issued a fact sheet assuring that irradiated Blue Topaz is safe for the person. After the controversy, strict rules have been imposed by NRC in regulating the license for the gems treated in Linear Accelerators and Nuclear Reactors. This ensures that the people get safe topaz (blue) to wear on their body and it doesn’t give out any harmful effects.

Topaz jewelry

Topaz jewelry is really one of the most commonly sold on the market – for the reason, that be it blue topaz engagement rings, any topaz jewelry, topaz rings, topaz pendants, topaz earrings – all these are quite close to the hearts of women. Blue is a favorite color for all women these days. It resembles the sky, the water, Kate’s wedding videos, and many more pleasant memories. We have collected some of the good designs and used the topaz images of jewelry to make a little topaz picture collage of Blue topaz jewelry. These include Topaz rings, Topaz pendants, and some of the most common Topaz earrings. Most of the designs are by Macy’s, so don’t forget to check their website.

blue topaz jewelry designs

Topaz – A Mass Market Gemstone – also a December birthstone.

1. The supply of mined colorless Topaz is large apparently larger than its current demand in the Gemstone Industry. This feature makes Topaz cheap and easily available gemstone.
2. The cost of cutting and radiation is sufficiently greater than the cost of the colorless Topaz. It is believed that 90% of the cost of Blue Topaz is constituted because of the various radiation and cutting methods used. Rest 10% is of the raw material.
3. Blue-colored Topaz is an excellent substitute for Aquamarine which is very costly. So the person who wishes to buy Aquamarine but could not afford it can also buy this alternative blue colored gemstone.

Conclusion- 
S.No.

Basis

Sky Blue 

Swiss Blue

London Blue

1.

Color

Light Blue

Medium Blue

Dark Blue

2.

The method used to change the color

Expose to gamma rays

Expose to high energy electrons in a linear accelerator.

Expose to neutrons in a nuclear reactor.

3.

Radioactivity

No

Yes

Yes

4.

The time-consuming method used in changing the color

No

Yes, to decay radioactivity gemstones have to keep aside for several months.

Yes, to decay radioactivity gemstones have to keep aside for several months.

5.

Price /carat

0.5$-2$

1.5$+

2.5$+

6.

Consumer Markets

Europe

U.S.A, Asia and Europe.

Europe, U.S.A and Australia.

7.

Other Name

No name

Electric Topaz.

Inky and Steely Topaz.

Table showing the difference between Sky Blue, Swiss Blue and London Blue.

Topaz Gemstones Quality factors

GIA is very good at explaining Topaz quality factors, but they are so in every gemstone. Topaz has very simple 4 C’s. The Cut and Clarity are is almost the best in its own ways – as the topaz comes clean and inexpensive they are usually cut for good fire (well-cut stones) so really the other C’s you have to worry about is:
Color – The color is one of the most important topaz quality factors as they come in many colors: White, Sky, Swiss, London, Mystic (100’s of colors), Orange/yellow topaz (Imperial), and many more coated colors.
Carat Weight – The carat weight is one of the 2nd most important quality factors in topaz. If you compare a 1-carat sky topaz with a 150-carat imperial yellow topaz – the price can vary hugely. Thus how many carats the stone is – is very important.

How to care for Topaz Ring?

How to Clean Blue topaz Ring
Copyrights Navneet Gems and Minerals – Simply save it on your phones to avoid any confusion and use it easily while actually doing it, this can be used for other gemstones such as “Quartz, Aquamarine, Ruby, Sapphire and anything that is harder or similar to Topaz (7 hardness)

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