Smelt Quartz” is commonly sold as a variety of quartz, especially from many eBay vendors. “Smelt Quartz” is not quartz at all, it is common glass, which is made from melting quartz in the presence another compound (called a flux) which lowers the melting temperature. Glass is not crystalline, whereas quartz and other minerals (with few exceptions) are crystalline. Most people can’t tell the difference, but glass is optically isotropic (doesn’t polarize light) whereas quartz is anisotropic (polarizes light). Glass also has a lower density, which you might be able to detect by its heft, and “smelt quartz” usually has unnatural looking streaky patches in it or are usually dyed. “Smelt quartz” does not have any of the properties of true quartz, which is one of the main types of crystals used in shamanic healing.
Quartz Crystal and glass are both made up of silicon dioxide. One major difference between glass and quartz is its subatomic structure. Glass is amorphous, meaning it has a random structure. Quartz on the other has a perfect, repeating molecular structure. It is crystalline and this is what gives it its healing power. It is this internal structure that makes it a crystal. Smelt quartz loses this crystalline structure and with it its ability to amplify and direct energy.
Citrine vs Fake Heated Citrine
Yellow – Orange
From citrina (color as yellow as citron).
Citrine is the yellow to brownish-red variety of the mineral Quartz. It is a widely used as a gemstone, and after Amethyst it is the most popular Quartz gem. Most Citrine is formed by heat treating purple Amethyst. Citrine may also be produced by heat-treating Smoky Quartz from certain localities. In some Amethyst deposits, the Amethyst has been partially or fully changed over to yellow Citrine by natural means of heating.
Natural Citrine, which is rare, is yellow to orange-yellow, and occurs in much lighter hues than the heat-treated material, which is dark orange-brown to reddish-brown. Virtually all heat-treated material has a reddish tint, whereas the natural specimens do not. Natural light yellow Citrine is often called “Lemon Quartz” on the gemstone market. Sometimes Citrine has a “smoky” hue to it, and can be borderlined between Citrine and Smoky Quartz, with either definition being correct.
The “Citrine” picture far left is what citirine on the market is usually sold as, however as you see of the right of this picture it’s amethyst. This is heated amethyst NOT Citrine Also, see the diamond shape? This crystal is a amethyst cluster like the clusters shown down further in this document. Heat treatment changed the colour to a bright orangish-yellow. Since amethyst is found in abundance, most “citrine” sold on the market is actually heat-treated amethyst. Unfortunately, with all the heat-treated amethyst flooding the market, it can be challenging to find real citrines. If you are looking at citrine for its metaphysical properties, be certain it is not heat-treated amethyst because it will not have the same healing properties as real citrine. Heated-amethyst “citrine” properties are almost identical to untreated amethyst. Now the Citrine on the top left is natural citrine and can tell a big difference from heated amethyst and citrine. Citrine is a member of the quartz family with a hardness of 7 which means it’s pretty strong. Its colour comes from Iron within its trigonal crystal clusters. It can range from very pale yellow to deep amber, nearly orange. It was named by the French. Citrine meant lemon. Most natural Citrines are a pale yellow colour. It does have the energy vibration sometimes resembling Smokey Quartz since they are related and sometimes look identical.
Note: Natural citrine is very rare. Large quantities of amethyst, usually of lesser quality, are heated to turn it yellow or orange and sold as “citrine.” Because the color is now caused by finely distributed iron minerals (mostly hematite and goethite), heated amethyst is not citrine in the strict sense, and also shows no dichroism in polarized light.
That a crystal shows dichroism does not mean it is natural citrine, it just means it is not heated amethyst. Certain smoky quartz and rock crystals can be turned yellow by careful heat treatment and/or irradiation, and these crystals will show dichroism.
Thin coatings of iron oxides on colourless quartz, as well as inclusions of yellow iron oxides (“limonite”), may simulate citrine.
Difference between Turquoise and dyed Howlite
Did you know that 90% of the Turquoise on the market is actually dyed Howlite? Howlite is an absorbent white mineral that can be dyed in almost any colour imaginable. So how do you tell the difference? The ideas we will discuss for telling them apart are:
- Appearance – Real Turquoise has a unique and identifiable look
- Colour stability – Can the colour be removed?
- Price – If it looks too good to be true it probably is
The beauty of Howlite is that it can be dyed any colour imaginable. The most common colour you will see it dyed is, of course, Robin’s egg blue. The same blue that the Persian Turquoise is known for. This way the cheaters can sell the imitation Turquoise for a high price and get the most profit. The other benefit of using Howlite is the natural webbing or matrix that occurs in this mineral. It is almost identical to the webbing in natural Turquoise. Since this webbing is basically impossible to manufacture it is easier to use an existing mineral that has the same properties. Below is a side by side picture of white Howlite (this is how it looks naturally), natural Turquoise and dyed Howlite. You can see how similar the webbing and matrix look.
The dye used on Howlite only penetrates the surface of the stone. The inside is still white while the outside is a vibrant blue. Some very cheap dyes will actually run with a bit of water added to it. These are the cheapest versions and many people complain about their pieces losing colour during raining days. We suggest buying turquoise from reputable sources, especially those who are experts dealing with turquoise. Before you buy your interesting piece of jewelries, make sure you know which mine the turquoise comes from and who the artists are. Ask them, do it has other related turquoise products, how long have them dealing with turquoise, etc. We hope you all find your ideal piece turquoise!
Dying of Crystals
Dye plays a role in mineral fakes, as many rocks would not sell readily en mass as drab clear, colourless and light brown/grey rocks. With several ways of processing, agates from Brazil can be dyed to green, blue, red, black and purple quite readily. One of the main reasons for colouring a mineral can be a lack of contrast. In the case of the uncommon mineral Okenite, the white puffballs on white quartz matrix did not have much contrast, but the okenite would draw in food colour willingly, making colourful blue and yellow okenites a common sight on eBay. Howlite was a very common material from southern California, commonly dyed blue to mimic turquoise. Now, as howlite has become scarce, magnesite from Africa is being marketed by Chinese lapidaries as howlite. Dyed agates are very common, making these various shades of blue, orange, green brown and pink to grace bookshelves and windchimes the world over as shown above image. Note that most dyed crystals are sold via ebay and etsy
References where the information was from