Simulants have been around since antiquity. As early as 4700 BC, Eqyptians produced a non-clay, ceramic compound, colored by copper, called faience with an appearance very similar to turquoise.
[Egyptian Faience beads circa 300-600 BCE] ...
Diamond Simulants: Cubic Zirconia
Cubic Zirconia
To the average consumer, Cubic Zirconia (CZ) is the most familiar type of diamond simulant on the market.
Diamond Simulants
There have been many natural and synthetic stones used to simulate diamond, these include glass, quartz, rock crystal (colourless quartz), natural rutile, synthetic rutile, natural sapphire, synthetic sapphire, natural spinel, ...
Synthetic and simulant are terminology used by the USBM for laboratory grown gemstones. Others in the gemstones industry may use different terms to refer to laboratory grown gemstones.
Simulants
The most convincing imitation is offered by synthetic spinel colored pale blue by cobalt. However these stones have an entirely different refractive index (1.72) and specific gravity (3.63) from those of aquamarine (RI: 1.57 to 1.
Simulant: A natural or manmade material that resembles a gem (also called imitation).
Sparkle: The amount of reflected light that radiates from a diamond's surface and combines both fire and brilliance.
Simulant: A human-created gem having the same look, but not the same physical properties, as its natural counterpart. An excellent example of a simulant is the cubic zirconia, which has a diamond-like appearance yet none of its properties.
Simulant
A simulant is a material which simulates, i.e. resembles, another more valuable substance. It does not mean synthetic or treated versions of real stones.
Simulant - The practice of simulating costly and precious objects with inexpensive substitutes has been traced back over 6,000 years ago in ancient Egypt. This practice continues today in simulating precious gemstones.
pearl,
simulant
I use South Ocean® simulated pearls which have layers of plastic "nacre" over a stone nucleus. It gives the illusion of a fine quality Tahitian black pearl, or cultured white pearl at a fraction of the cost.
peridot ...
Diamond Simulants
There are several diamond simulants that are available in the market for prices far below that of a real diamond.
Simulant Description Distinction
Vulcanite
A black or red vulcanized rubber with sulfur, invented in 1839 by Charles Goodyear.
A sulfur smell may be detected upon rubbing the item or after keeping it in an airtight container for a while.
SIMULANT A material used to mimic or resemble another. Plastics are commonly used to simulate the look of genuine gemstones.
SOLITAIRE
Typically used to describe a ring or pendant set with a single gemstone.
Simulant
Imitation diamonds that are made of diamond like material, either natural or synthetic. Marketed to look like real diamonds. Examples include CZ, GGG, moissanite etc.
Single cut ...
A gold simulant, invented circa 1720 by Christopher Pinchbeck, which is comprised of a mixture of copper and zinc
Piqué
Tortoiseshell or horn which is inlaid with mother-of-pearl, silver or gold ...
Also known as simulants, imitation gems don't have the same properties (i.e. optical, physical, and chemical etc.) as natural gemstones but resemble the natural gemstone they imitate.
A lab-created simulant of tanzanite is called tanzanique. It closely mimics the color of natural tanzanite however it does not display the same trichroism. Tanzanite is the mineral zoisite, while tanzanique is forsterite.
Synthetics, simulants, and enhancements
Main articles: Synthetic diamond, Diamond simulants, and Diamond enhancement ...
Simulant Gems
A synthetic has the same chemical and basic physical properties as the natural gem. A simulant gem looks like the natural gemstone. A lab grown diamond is crystalline carbon.
Diamalite Diamond Simulant Stones & Jewelry
Diamond Jewelry
Gold & Silver Lockets ...
Moissanite in mid-1998 began to make a huge splash in the gem world as the latest and greatest diamond simulant.
Cubic Zirconia stones are a man-made diamond simulant having optical characteristics that are very close to natural diamonds. On the mohs scale of 1-10 for hardness, a CZ is 8.5 - 8.9, while a diamond is 10.
Spinel (MgAl2O4) is a much maligned gem mineral that is often thought of as a corundum simulant because in red and blue varieties it can closely resemble ruby or sapphire.
Use of Zircon as a simulant fell out of favor when the superior synthetic diamond simulants arrived such as YAG, GGG and cubic zirconia.
Perhaps, the rapid creation and marketing of synthetic red beryl will increase the importance of presenting information regarding man-made counterparts and simulants together with information about the natural gems.
Cubic zirconium (singular) is a man-made gemstone that is commonly used as a diamond simulant. It is a true synthetic since a cubic form of zirconium oxide exists in nature.
Strontium Titanate: another simulant with a man-made chemical structure SrTiO3 , but with a much lower hardness, 5.5. It has a much higher dispersion than diamond (0.19), and thus far more color-play.
Cubic zirconia A lab created diamond simulant, often abbreviated as CZ. While CZ is a transparent stone, trace elements can be added to the manufacturing process, producing a wide range of colors.
IMITATION PRODUCTS-SIMULANTS (SUBSTITUTES)
IMIT
"IMIT" is the tag code used for a manufactured product fabricated in such materials as glass, ceramic or plastic designated to imitate or resemble the appearance, ...
Moissanite is also grown in laboratories and is used as a diamond simulant, apart from gemstone. Unlike other diamond, it is thermally conductive and this property is used as the test for the authenticity of real diamonds.
CZ denotes cubic zirconium, a widely used simulant, an imitation for a natural gemstone including diamond. But CZ is easily detectable by it's 80% higher weight than a normal stone of the same proportions or by thermal conductivity testing.
Deep ...
Quartz Sometimes used a an imitation or simulant for diamond, particularly the transparent colourless form known as rock crystal.
Radiant Cut Radiant cuts combine the best of brilliant cuts, with a square emerald cut outline.
Synthetic Gemstone
A man-made stone that, unlike a simulant, has the same chemical composition and crystal structure as its natural counterpart.
Transparency
The degree to which light passes through a material.
An additional review is done to determine whether the submitted gem is a synthetic diamond or a simulant, or if the diamond's color is lab induced rather than natural.
Although colorless zircon was used in history as a diamond simulant, it has nothing to do with the now popular cubic zirconia, or zirconium oxyde which is a laboratory grown material.
Pinchbeck
A gold simulant, invented circa 1720 by Christopher Pinchbeck, which is comprised of a mixture of copper and zinc ...
Publication Description - This quarterly journal offers up-to-date technical information about Diamonds and Colored Stones - where they are found, their special characteristics, simulants and synthetics, treatments and identification techniques.
simulants. "A" vs. "B" vs. "C" vs. "D". "A" jade is natural with just a wax finishing, "B" jade has been acid "bleached" and polymer impregnated, "C" jade has been dyed, while "D" jade has been acid "bleached", polymer impregnated, and dyed.
Cubic Zirconia (or CZ) is zirconium oxide (ZrO2), a mineral that is extremely rare in nature but is widely synthesized for use as a diamond simulant.
Due to their name similarity, many people assume that Zircon, a natural diamond substitute, and cubic zirconia, a manmade diamond simulant, are one and the same—or closely related. They are not.
Lab-grown stones - Any gemstone that is simulated in the lab using the same, or similar, properties found in the natural stones. These simulants are not considered imitations, but they are not natural.
Zircon resembles diamond in its luster and fire, yet it has a tendency to chip out at the facet junctions over the years, so it not prized as highly. (Cubic zirconia, a well-known diamond simulant, is an altered form of the mineral baddeleyite, ...
A man-made material used in lasers that duplicates the atomic structure of garnet. Its technical name is YTTRIUM ALUMINUM GARNET. Colorless YAG is used as a simulant for diamond. It was replaced with Cubic Zirconia.
Zirconia ...
Simulated stones - Natural or synthetic substances meant to resemble a genuine gemstone. Cubic zirconia is a diamond simulant.
had produced gem-quality synthetic diamonds that were colourless or that showed yellow or blue, but they show technical deviations from the natural stones and under a microscope have a 'dusty' internal look. Some man-made stones are sold as simulants ...
Usage: Moissanite has the potential for shimmering brilliance, fire, luster, and incredible hardness. It has many uses especially as an abrasive, semi-conductor and as Diamond simulants.
A mineral species that yields exceptionally brilliant, transparent gemstones. Most popular in blue, which is one of the December birthstones, not to be confused with Cubic Zirconia a diamond simulant.
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The laser industry has perfected some synthetic garnets with crystalline structures similar to the natural gem, but different in chemical composition (it's a non-silicate). Synthetic ruby and spinel are also used as a garnet simulant, as is glass, ...
and suspended from a smaller stone which is usually separated by a bow or other motif Pietra Dura Mosaic of semi-precious stones set into a floral pattern of black marble or onyx, also known as a hardstone mosaic Pinchbeck A gold simulant, ...
 See also: Stone, Color, Jewel, Gemstone, Diamond
  
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