Quartz is the most common mineral on earth, making up about 12% of the Earth’s crust. Second only to feldspar, which is more common. However, one shouldn’t judge from this that quartz is uninteresting. In fact, the quartz family is surprisingly very diverse. The fact that they are inexpensive just means there are more opportunities for collectors.
All quartz is made of silicon dioxide, but this was not discovered until the early 19th century. Prior to that, various forms of quartz were thought to be distinct minerals. This is not actually surprising, since there are two different branches of the quartz family.
Macrocrystalline Quartz: macrocrystallinemacrocrystalline quartz
Macrocrystalline quartz, as the name suggests, has large crystals with distinct shapes that can be distinguished by the naked eye, that run the gamut from tiny druzies all the way up to crystals larger. These types of quartz are mainly transparent to translucent, with a vitreous luster.
Microcrystalline Or Cryptocrystalline Quartz: microcrystallinemicrocrystallinefibrousgranular
The granular varieties include jasper and bloodstone. Jasper is typically multicolored, spotted, or flamed. Especially valuable pieces form patterns that look like natural landscapes. While Bloodstone, also known as heliotrope, is dark-green with flecks of red, caused by iron oxide.
eye agatemoss agatefire agate
Different Types of Treatment or Enhancement Used:
Colorless quartz is always untreated. Colored stones can occasionally be enhanced in color by dying (a combination of bathing in color agent solutions, followed by heating), irradiation (bombardment with low-level radioactivity), or heating.
Reliable gemstone dealers will always inform their customers about any kind of treatment. Some quartz gems can lose their color saturation over a period of time in daylight. The original color can be restored by X-ray radiation.
not known to be enhanced.
Bi-colored Quartz is a natural mineral in nature and not enhanced, This gemstone can be created synthetically or treated by dying/irradiation/heat to create mass quantities or colors not typically found in nature. When natural bi-colored quartz is found in nature, there is no need for treatment or enhancement.
There are many ways to identify natural carnelian. When held against the light, the dyed agate will display striping, while the natural carnelian will show a cloudy distribution of color. Natural carnelian is increasingly rare. Carnelian can be Heated to darken the color.
Multiple Types of Chalcedony:
Agate jasper, which grows with agate, is green, brown, or yellow blended. Onyx is a layered gemstone with a black base and a white upper layer. Agate is usually dyed with bright colors.
Bloodstone: Bloodstone is not treated in any way.
Misty blue Chalcedony is not treated. The Aqua blue chalcedony is dyed.
Chalcedony: Onyx: Black and colored onyx is dyed.
Chrysoprase: Chrysoprase is not enhanced.
Cat’s Eye Quartz:
Cat’s Eye Quartz:
Treatments of Cat’s Eye Quartz:
Crackle Quartz: Enhancement: Heat, dye.
Dendritic Quartz: Natural Untreated Quartz
However, the majority of stones are unattractive off-white or a washed-out grey. Only a few provide the finest shades of gem-quality Drusy quartz.
© Crystal Classics
Prasiolite (Green Amethyst):
commented treatment is used to add this lovely inclusion.
Tiger’s Eye Quartz: not enhanced.
Hawk’s Eye Quartz:not enhanced.
In today’s gemstone market quartz is being used to fraudulently stand-in for many other gemstones such as Topaz, Ametrine, and many other natural gemstones, we see this the case with many types of topaz such as Mystic topaz and other bi-color or multi-color gemstones with the treatment of chemicals.
This is extremely unfortunate, but as vendors, we need to know what to look for when providing gemstones for our customers, one way to prevent buying synthetic gemstones is to use a reliable source for the main gemstones you buy, for your own collection, or for resale purpose.
Asia has been a regular source of synthetic gemstones for over 20 years. The market is flooded with these synthetic or fake gemstones.
The scarcity of natural resources or gemstones is one of the main reasons this has happened. Also, dangerous mining conditions and Laws preventing importing or mining gemstones are all issues that cause the creation of synthetic gemstones, and there is a market for the item.