Table of Contents
What type of rock is blue topaz?
Topaz is often treated with heat, or radiation to make it a deep blue, reddish-orange, pale green, pink, or purple. Topaz is a nesosilicate mineral….
| Topaz | |
|---|---|
| Category | Nesosilicate minerals |
| Formula (repeating unit) | Al2SiO4(F,OH)2 |
| Strunz classification | 9.AF.35 |
| Crystal system | Orthorhombic |
What types of rock is topaz found in?
Topaz is an aluminum silicate containing fluorine and has a chemical formula of Al2(F,OH)2SiO4. It is formed by fluorine-bearing vapours given off during the last stages of the crystallization of igneous rocks. It typically occurs in cavities in rhyolites and granite, in pegmatite dikes, and in high-temperature veins.
Where is blue topaz found?
Natural blue topaz exists but it is rare and very pale in color. Most are found in Brazil but a few natural blue topaz gemstones were discovered in the United States in Texas. Blue topaz is now the state gem of Texas.
What is topaz found in?
Today, topaz deposits are found in Brazil, United States, Madagascar, Myanmar (Burma), Namibia, Zimbabwe Mexico, Sri Lanka, Pakistan, Russia, and China. Topaz can feature the amber-gold of cognac or the blush of a peach, and any shade of warm brown or orange in between.
How can you tell if topaz is real?
There are a few easy ways to tell a real topaz apart from quartz. The first characteristic to keep in mind is the hardness factor. An original topaz will scratch glass while quartz will not leave a mark on it. Moreover, a real topaz is also cool to touch and it gets electrified easily.
How much does a topaz cost?
Colorless topaz, from which blue topaz is produced (via irradiation and heat), is available in sizes up to 100 cts. and greater, and sells for less than $8/ct. Brown topaz fetches similar prices. In contrast, precious topaz (a.k.a. ‘imperial’ topaz) in rich orange colors fetches prices in excess of $1000/ct.
What color is topaz in the Bible?
orange-yellow
Topaz, or ancient chrysolite, is an octangular prism of an orange-yellow colour; it is composed of alumina, silica, hydrofluoric acid, and iron.
Why is blue topaz so cheap?
Blue topaz makes a much affordable option than an aquamarine gem, due to its availability. Pure aquamarine, a rarer gemstone, comes with a heftier price tag—just like its sibling, the emerald, from the same beryl family of minerals.
How do I know if my blue topaz is real?
Is topaz expensive?
In contrast, precious topaz (a.k.a. ‘imperial’ topaz) in rich orange colors fetches prices in excess of $1000/ct. for large (10 ct. +) sizes. The most valuable topaz is a rich pink or red color, and can reach $3500/ct.
What is the rarest color of topaz?
The traditional November birthstone, topaz is a popular gem. Although frequently associated with golden yellow as well as blue, it can be found in a variety of colors, including colorless. The rarest are natural pink, red, and fine golden orange, sometimes with a pink tone.
Does topaz fade in sunlight?
High heat or sudden temperature changes can cause breaks in topaz. The gem’s color is generally stable to light, but prolonged exposure to heat or sunlight might cause fading in yellow-to-brown, reddish brown, or dark brown topaz.
Is topaz a gemstone?
Topaz is a precious gemstone that is most often amber in color. When pure, this stone is colorless, but additions of minerals create the typical yellow hue.
What does Swiss blue topaz mean?
The meaning of blue topaz is symbolizes fidelity, eternal love and mutual understanding. Blue topaz stone is a gemstone that is very important in the life of lovers; these stones make them roll life in harmony until the end. We suggest wearing Swiss blue topaz as a ring is better.
Is topaz natural?
Topaz is a natural gemstone that can be many colors (but usually something brown). Every shade of blue topaz is almost always heated and/or irradiated to achieve the color.
What is blue topaz worth?
Blue Topaz is quite valuable, although the highest values go to the rarer red, pink, yellow, and orange stones. When Blue Topaz was first introduced, the treated kinds sold for about $20 to $40 per carat. But because of the oversupply of Blue Topaz stones, wholesale prices dropped significantly per carat.