Clarity and transparency of a gemstone are primarily affected by blemishes and inclusions.
Transparency: heating dissolves or partially dissolves fine rutile needles thereby increasing the clarity and transparency of the gem.
Transparency (or lack of it) is dependent on how much light gets through the gem, and is affected not only by the chemical and crystalline nature of the gem, but also by its thickness and, as in the case of luster, by inclusions, ...
Transparency
Do note that the last C in the list doesn't even begin with a C! :)
I'll add one more C to the mix.
Transparency: The higher the transparency in light opal and fire opal, the more valuable the stone. For black opal, the opaque, blacker stones are usually more valuable than those with more transparency.
Transparency: refers to a gemstone's relative ability to transmit light.
Cutting ...
Transparency
The degree to which light passes through a material.
Trichroism
Gems that display three different colors when viewed from different angles.
TRANSPARENCY - The ability of a substance to transmit light.
TREATED GEMS - A general term used to described gemstones that have been artificially modified to improve their color or clarity.
Transparency - The ability of a substance to transmit light.
Treated Diamonds: A diamond with a body color induced by some form of artificial irradiation, often in conjunction with controlled heating (known as annealing).
Transparency
Transparency refers to the degree to which a gem allows light to pass through it. A gem can be transparent, translucent, or opaque. Transparency is an important factor in determining the value of a gem.
The Transparency & Opacity of Gemstones
The transparency or opacity on a mineral is referred to as its "diaphaneity," which describes the quantity of light that is able to travel through a material.
Transparency
Opaque
The best stones are almost natural but they are fragile and prone to color fading. But the nice look and the royal colour attract everybody. These stones are cut, shaped and polished to mount on your third finger.
TRANSPARENCY - The ability of a substance to transmit light. In gem testing terms transparency is called " diaphaneity." The degrees of transparency are: ...
Transparency...The degree to which light passes through a substance.
Twin Crystals...Two or more crystals which have grown together in a symmetrical fashion.
Ultraviolet Light...Wavelengths of light shorter than visible violet light.
Lacking transparency, impervious to light
Opera
Term used to describe the length of pearls or a necklace (usually more than 30 inches long) ...
Transparent (transparency)
The degree or amount of light which is transmitted trough a substance. A stone can be called transparent when an object can be seen trough it. Samples. Diamond, Quartz, Glass.
Transparent, Transparency
Ideally, a diamond should be completely transparent, any opacity is undesirable.
Trap Cut ...
With a brighter transparency than black opal, semi black opal has a body color darker than grey, but not quite black. Opacity is the key that divides black from semi black with black opal appearing more opaque than semi black opal.
Luster and transparency. The way a mineral transmits or reflects light is a diagnostic property. The transparency may be either opaque, translucent, or transparent. This reflectance property is called luster.
In regard to minerals, it is variable with transparency. divitrification Changing over from a natural glass to a mineral with a crystalline structure. To devitrify is the process of a natural glass to lose its glassy nature and crystallize.
Luster - Influenced by transparency and thickness of the nacre, and the bead nucleus used. Pearls with nacre too thin or opaque tend to look chalky rather than iridescent. Nacre thickness of 0.5 mm or greater is needed for a good luster.
Color is the ruby's most important feature: transparency is secondary. Inclusions, therefore, don't affect the gemstone's quality (unless they decrease the transparency), but rather are the gemstone's fingerprints.
9 These last are plainly remnants of what must once have been elegant specimens; but spodumene is extremely subject to alteration, and has generally lost all its transparency and beauty of tint.
Summer 1972, Transparency in black opals, p. 40, 2pp.
Summer 1972, An opal cabochon in which the chipped back was epoxy filled, p. 43, 2pp.
Fall 1972, High transparency in some black opals, p. 88, 2pp.
In general, the value of jade is determined according to its colour and the intensity of that colour, the vivacity and texture, and its clarity and transparency.
Relative differences in opacity and transparency are described as luster. The term luster refers to the quantity and quality of the light which is reflected from a mineral's exterior surfaces.
Diaphaneity transparency or more commonly "crystal" is the true fourth C of colored gemstone evaluation. As mentioned, tourmaline is normally a daystone. That is, it looks its best in natural lighting.
Early gem merchants sought to purify the transparency of their emeralds by immersing them in clear oils or paraffin. They found that clear oils and waxes rendered surface fissures less visible to the eye.
Crystals of suitable size and transparency have been fashioned into gemstones, usually featuring the brilliant cut to best display sphalerite's high dispersion of 0.156 (B-G interval)-over three times that of diamond.
Transparency: Translucent, opaque
Large pieces of a single color are rare
Sensitive to heat, acids, ammonia, and hot water
Can be found in Zaire, Russia, Australia, Chile, Namibia, Zimbabwe, and Arizona ...
To make a wise choice, you must be able to judge their color, flaws, transparency and brilliancy. This guide will show you how.
Colors D, E and F are essentially without color and differ more in transparency. Colors G, H, I and sometimes J, will usually show little or no color in the face-up position (as set in jewelry) for most diamond shapes.
The diffused sleepy effect, together with the tiny inclusions that produce it, reduce transparency somewhat in Kashmir and Kashmir-type sapphire. In such cases, the beauty of this unique phenomenon makes up for some loss of crystal.
Value of this gemstone depends on its size, color and transparency. Top-quality sapphires are extremely rare in all the gemstone mines of the world.
The characteristics of crystals of diopside vary between transparency and translucency. There are uneven and rough fractures on the stone with streaks of white on it.
Driven ever onwards, the 16th Century saw Venetian artisans gain even greater control over the colour and transparency of their glass, mastering a variety of new decorative production techniques.
These reports identify the material of your specific gemstone, outline its color, transparency, shape, cut, dimensions, and weight, and include a digital color photo of the stone.
When present, these inclusions decrease the transparency of a stone and are known as silk. When in dense, parallel groupings, these inclusions can actually enhance by allowing the polished Sapphires to exhibit asterism.
Where beauty is concerned, this jewel may truly be called ideal for many reasons: It offers the qualities of transparency, lovely coloring and soft brilliance. These qualities brought it into popularity centuries before the Christian era.
Iceland spar is used in the optics industry for it's transparency and ability to split images. It can be used to determine the distance to an object viewed through it, and was used in the bombsites of world war II bombers.
Diaphaneity - Synonym for transparency
Discoidal - A round, disk-shaped habit, thicker in the middle than at the edges.
Dodecahedron - A twelve-sided crystal in the Isometric system.
Transparency and lightness in color tone account for Aquamarines pastel shades of color. The word Aquamarine is actually derived from the Latin meaning: water of the sea.
Opaque refers to the transparency of a gemstone. Generally opaque stone does not transmit light as it is so thick with inclusions or flaws and due to that light is blocked from passing through the gemstone.
Optical Effects ...
A study performed in 1997 by the GIA found that the level of fluorescence has no widely perceptible effect on the color appearance or transparency of diamonds when viewed table down (upside down).
Luster: Vitreous to silky
Transparency: Transparent to translucent
Crystal System: Triclinic
Fracture: Splintery due to the cleavage
Streak: White.
Size, presence of insects or plants and transparency are the main criteria when choosing amber.
Chanthaburi
Consult list of gems available on the Chanthaburi market...
Of a fairly rich colour and transparency, they are not normally of gem-quality as a result of the many inclusions and/or flaws they contain.
OUTER HEBRIDES ...
Bivalve mollusc whose shell measures around 15 cm. It is famous for its transparency, especially during the first years of growth and is called window-pane shell or Chinese glass. It produces small, irregular, opaque lead-colored pearls.
Crystalline: A substance composed of crystals or resembling crystal in transparency, structure and outline.
Crystallize: To cause a material to form crystals or to assume both the internal structure and external form of a crystal.
Relatively few large stones of sufficient transparency for cutting are produced in the Bohemian mines. The so-called "Cape rubies" of the diamond mines of South Africa are pyrope garnets and some large and fine ones are found.
There is a tanzanite specific issue when it comes to carats; these gemstones tend to look lighter in shade in smaller sizes due to the high transparency level. As a general rule, the bigger the size, the better the color.
The color of the enamel and its degree of transparency depend on the metal oxides that exist in the glass and the temperature at which the glass melts and coheres to the surface.
I1, I2 and I3(Included) - Diamonds with inclusions obviously visible under 10x magnification and may effect transparency and brilliance.
Note: We do not sell I-grade clarity loose diamonds.
B2C Jewels' Ideal Clarity Grade ...
diamond (n) the hardest naturally occurring mineral. It is a gemstone whose hardness and transparency make it highly desirable in jewelry making. Diamond is an allatrope of carbon.
Unfortunately, most of the ruby production from these countries has many inclusions, tiny flaws which diminish transparency. Rubies from the African mines are rarely transparent enough to facet.
Amethyst can vary in transparency from clear to translucent, and generally the more transparent the stone, the more it is valued. It has a hardness of 7 on the Mohs scale, making it a relatively hard gemstone.
Most distinguishing features:
Single large crystals of gypsum, typified by hardness and transparency.
Industrial/economical uses:
Used in gypsum wallboard.
Garnets are ideal for use in jewellery because of their high refractive index, durability, transparency, and colour range.
Chalcedony � Agate and Onyx ...
The finest quality of amethyst exhibits a high degree of transparency and a rich deep purple color enhanced by flashes of burgundy or rose. Amethyst are most commonly found in Brazil, Uruguay, Canada and the United States (North Carolina).
On a spiritual level, a gemstone uses this mutual affinity to express its healing powers.
It spiritually influences us through color, shape, transparency, and through the principle of synchronity.
 See also: Stone, Gemstone, Color, Jewel, Gemstones
  
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