Adamantine (a) Brilliant light reflecting and transmitting properties in diamonds and other gemstones, known as adamantine lustre.
adamantine luster Adamantine comes from the Greek word adamant meaning diamond. Adamantine luster means diamond-like luster. It is a property of certain gemstones, especially diamond, of very high reflectivity.
Adamantine
Adamantine means inflexible, compared to the hardness or luster of a diamond.
Adularia
Adularia is a whitish-blue moonstone, popular for Art Nouveau jewelry.
ADAMANTINE. Very hard--as hard as steel. From Adamas (Greek) ; Adamanta (Latin), the lustre of the diamond.
AGGREGATES. Clusters or groups.
ADAMANTINE
Adamantine means having a luster like that of a diamond.
ADULARIA ...
Adamantine: Having a diamond-like luster or hardness.
Adularia: A common type of moonstone, usually set as a cabochon. It is semi-translucent with a white and blue tint. Adularia was very popular in Art Nouveau jewelry.
Adamantine: Having a diamond-like luster or hardness.
Adder Stone: This is a highly absorbent stone that was formerly believed to be of help to draw out poison, as from a snake bite. These stones were set in finger rings and worn as an amulet.
Adamantine
The term used to describe a gemstone with a brilliant luster like that of a diamond.
Adamantine Refers to the diamond-like luster of a gemstone. Gemstones with a diamond-like luster include diamond (of course), demantoid garnet and sphene.
Adamantine
This refers to the surface luster and shine of a diamond.
Adamas ...
adamantine
Having a luster like that of a diamond
aigrette
A piece of jewellery shaped like a feather that is usually worn on the hair or on a hat ...
Adamantine or brilliant A brilliant luster such as the sparkling reflection of diamond is known as adamantine. Minerals of adamantine luster have high refractive indices (1.9-2.6) and are highly dispersive and translucent.
Adamantine - Refers to the light reflecting properties of a metallic surface, known as metallic luster.
Adamantine: Inflexible. Like a diamond in hardness and luster.
Adularia: A translucent white and blue moonstone popular in Art Nouveau jewelry.
African Emerald: A green fluorspar mined in South Africa. It is not an Emerald.
Adamantine Luster. The luster of a diamond is called adamantine (the adjective uses the Greek name for the stone itself). It is keen and cold and glittering, having a metallic suggestion. A very large per cent.
Adamantine is a Mineral, often referred to as Adamantine Spar. It is a silky brown form of Corundum. It has a Mohs rating of 9.
Adamantine means having a luster like that of a diamond.
Adularia
Adularia is a common type of moonstone, a whitish-bluish semi-translucent stone. Adularia is usually set as a cabochon.
Adamantine... Very high luster.
Aggregate...Intergrowth of several crystals, these may be globular, fibrous, reniform, or radiating fibrous.
Adularescence...The sheen of color seen in moonstone and other feldspars of the adularia variety.
Adamantine crystals, dull when massive earthy
Refractive index
nα = 1.878 nβ = 1.883 nγ = 1.895 ...
Adamantine (diamond-like)
Text Source: Rocks and Minerals, by Charles A. Sorrell (C)1973 Western Publishing Company Inc.
Illustrations: Personal Collection of the Author ...
Adamantine
A term that means having a lustre like that of a diamond
Adularia
A common type of moonstone, a whitish-bluish semi-translucent stone usually set as a cabochon.
Adamantine: Very bright and reflective, almost metallic, luster as displayed by diamonds. The descriptive term sub-adamantine is also sometimes used to describe gems with a bright luster closer to diamond (e.g., demantoid garnet).
adamantine
The term adamantine is used to describe any gemstone that has diamond-like luster. Only a few gems exhibit such exceptional light reflectance: cerrusite, sphalerite, and demantoid are three examples.
adularescence ...
Luster: Adamantine; uncut crystals look greasy
Hardness: 10; approximately 4.5 times harder than corundum!
Toughness: good ...
A: acicular, adamantine, adularescence, Akoya, allochromatic, alluvial, almandite garnet, ametrine, ammolite, Andalusite, angelsite, annealing, apatite, aventurescence ...
Diamond's true adamantine luster comes from its excellent transparency and high refractive index of 2.418. Its brilliance is penetrating to the extent that it triggers our senses to produce diverse feelings.
May-June 1934, Adamantine-spar brown corundum (rarely asterism), p. 82, 1p.
Summer 1937, New black star sapphires found, p. 98, 1p.
Fall 1939, Lined, foil-backed corundum produces stars and cat's-eyes, p. 36, 1p.
adamantine Pertaining to luster. Transparent minerals with a very high luster are said to have an adamantine luster.
Adamantine - diamond-like luster.
Adularia - "flash" in moonstones created by microscopic inclusions.
Amorphous - describes a substance with no precise patterning of atoms.
Asterism - " star effect " in gems.
Some types of luster include: adamantine (also called brilliant or diamond like, like a faceted diamond), earthy (with little reflectivity- also called dull, like shale or clay), greasy (like nepheline or apatite), metallic (also known as splendent, ...
Adamantine - Having a diamond-like luster. The brightest luster in minerals.
Aesthetic Specimen - A mineral specimen displaying an exceptionally attractive form.
Aggregate - A group of crystals of one or more minerals.
The distinctive appearance of a well-cut diamond is based on the effects of its adamantine luster, the perfect flatness of its polished facets, giving undistorted reflections, and its fire, all these due to its extreme hardness, ...
Its luster is defined by terms such as 'adamantine' and 'greasy'. It is found in a number of colors such as black, yellow, red, white, wine, purple, and brown and its estimated density is about 6.99g/cm3.
Luster: Adamantine (highest luster of any material on earth)
Hardness: 10 on the Mohs scale (hardest of all materials on earth)
Density: 3.515
Cleavage: Perfect in one direction. Considered brittle along its octahedral crystal planes.
The gem was first discovered in Russia and the name is derived from its diamond-like adamantine luster. The name Demantoid means diamond-like, because it has a very high adamantine lustre, and a colour dispersion higher than diamond.
Its adamantine lustre and high colour dispersion make colourless variants of zircon appear similar to diamond. As a gemstone it is relatively unpopular. This may be due to confusion between zircon and cubic-zirconia.
Optics -- R.I. 2.01-2.03. Uniaxial positive. Adamantine luster.
Durability -- Hardness 4-4.5. Brittle and heat sensitive with one direction of perfect cleavage. Not durable enough for use in jewelry.
Crystal structure -- Hexagonal.
Appearance
Yellow to greenish yellow with adamantine luster, rarely pink, black or brown.
Enhancements
Sphene is not known to be enhanced.
Luster
The appearance of a surface resulting from reflected light. Diamonds exhibit Adamantine Luster, glass and most gemstones exhibit Vitreous Luster, amber exhibits Resinous Luster.
LUSTER The shine or finish on the surface of a gemstone. GIA describes luster in the following categories: ADAMANTINE - Diamond like. GREASY, METALLIC, RESINOUS, VITREOUS or WAXY.
The most intensive luster is seen in the highest refractive indices, diamond, zircon, and rutile, and is known as an adamantine luster. Hematite produces a metallic luster, even though it is not transparent.
52, and its lustre is adamantine. Diamond ranges from colourless to yellow, brown, gray, orange, green, blue, white, black, purple, pink and extremely rarely, red.
Luster is mainly dependent on stone's surface (polish) and the reflective index of the mineral. Luster can be described as: adamantine, pearly, greasy, metallic, silky, resinous, vitreous, earthy (also known as dull) and waxy.
Introduction/Name. Demantoid is the name given to the rich green variety of andradite garnet. The gem was first discovered in Russia and the name is derived from its diamond-like adamantine luster.
back from the surface of the stone, and this occurs at the same angle ,to the normal of the surface N as that at which it meets the surface (Fig 182).
By the luster of a gemstone - and in diamond it is very marked and is described as "adamantine" - ...
Transparent minerals with a high index of refraction such as diamond appear brilliant and are said to have an adamantine luster, ...
 See also: Color, Diamond, Luster, Stone, Mineral
  
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