Cryptocrystalline: masses made up of either fibrous or granular aggregates of quartz. Both are tough and compact, and take a good polish when cabbed.
cryptocrystalline (n) tiny crystals which are not discernable through optical microscopes. Cf Microcrystalline.
crystal (n) a substance with a regular atomic structure. Cf mineral ...
Cryptocrystalline quartz is quartz in which the crystals are microscopic in size and thus is always opaque or translucent. It occurs in a huge array of colors and patterns and, like crystalline quartz, occurs in myriad locations.
Cryptocrystalline
Extremely small crystals which cannot be seen separately, even under high magnification.
Crystal
A solid made up of atoms, bounded by natural planar surfaces.
Cryptocrystalline aggregates: Aggregate quartz gems such as: agate, chalcedony, and jasper are generally referred to as cryptocrystalline (crypto, meaning "hidden").
Cryptocrystalline
This term is used for a mineral structure in which crystals are very small and due to that they are not even distinguishable through a microscope.
Crystal ...
Cryptocrystalline quartz includes varieties whose individual crystals are too small to be easily distinguished.
Cryptocrystalline quartz
Color/Spectrum
White, black, green, brown, blue, red, etc.
Cryptocrystalline
Crystals so small that the can't be seen with a normal microscope and show no external sign of a crystalline structure.
Cryptocrystalline Quartz - material is an aggregate of a multitude of small crystals. Two types of aggregates; fibrous (called chalcedony) and granular:
Fibrous - characterized by microscopic slender crystals ...
Cryptocrystalline.......The structure of a substance as chalcedony, that consist of very small crystals but show no external sign of crystal structure.
Any cryptocrystalline quartz, although generally only used for white or lightly coloured material. Otherwise more specific names are used.
Agate
Multi-coloured, banded Chalcedony, semi-translucent to translucent ...
Chalcedony is a cryptocrystalline variety of silica mineral quartz with a wax like luster. Cryptocrystalline is the chemical name for fine grained.
Chalcedony: Cryptocrystalline variety of quartz that produces many ornamental gemstones in a wide range of colours. Often dyed to simulate other opaque gemstones.
Chalcedony (n) Chalcedony is one of the cryptocrystalline varieties of the mineral quartz, having a waxy (semi-gloss) luster.
Chalcedony is a catch-all term for cryptocrystalline quartzes (quartz with microscopically small crystals). The chalcedony family as a whole includes agate, jasper, carnelian, chrysoprase, onyx, bloodstone, aventurine, flint, chert and sard.
The variety of chalcedonies is even greater than that of transparent quartz, including cryptocrystalline quartz with patterns as well as a wide range of solid colours. Agates are banded. Bloodstone has red spots on a green background.
Is Sub-categorized into two different areas: Macrocrystalline quartz and Cryptocrystalline quartz.
The Macrocrystalline quartz can be seen by the naked eye.
chalcedony - is the cryptocrystalline variety of quartz. They form in massive semitransparent to translucent material, often found in white, gray, black, browns and varying intensities of all colors.
Cryptocrystalline Quartz
This is a group with microscopically small crystals of quartz embedded in opal, which is itself hydrated quartz.
Apatite is widely distributed in all rock types " igneous, sedimentary and metamorphic " but is usually found only as small, scattered grains or cryptocrystalline fragments.
It is sometimes used to describe a grayish to bluish variety of cryptocrystalline quartz, or may be used as a more generic term to describe all varieties of cryptocrystalline quartzes. In the latter case it is used as a species name.
Quartz is a crystalline mineral that occurs in two varieties: macrocrystalline where crystals recognizable with the naked eye and microcrystalline or cryptocrystalline where crystals too small to see without high magnification.
The many semi-precious stones which have a quartz basis (such as the varieties of waxy or cryptocrystalline chalcedony which is largely quartz in a very minutely crystalline condition) are often even tougher than the clear crystallized quartz.
Macro crystalline and Cryptocrystalline. Macro crystalline are the larger crystals easily visible by the naked eyes. Few names of this variety are Amethyst, Citrine, Rock crystal, Smoky quartz, Rose quartz.
Chalcedony: A family of colored quartz stones of the cryptocrystalline variety, including agate, onyx, carnelian, cat's eye and jasper that commonly have a milky or waxlike luster.
Chalcedony is a catch all term that includes many well known varieties of cryptocrystalline quartz gemstones. They are found in all 50 States, in many colors and color combinations, and in sedimentary, igneous, and metamorphic rocks.
Jasper is an opaque, impure, cryptocrystalline variety of quartz that may be red, yellow, or brown. It breaks with a smooth surface and can be highly polished like marble.
A form of quartz which is cryptocrystalline (contains microscopis crystals).
Banded Agate - A translucent, cryptocrystalline variety of quartz and a sub-variety of chalcedony. The colorful, banded rocks are used as a semiprecious gemstone.
Jasper: Jasper is a fine-grained form of Chalcedony, a cryptocrystalline form of Silica that is related to quartz. 6.5-7 on the Mohs Hardness Scale. Polishes easily with a soft cloth, but water may diminish luster.
The term chalcedony is the term used to refer to a group of microcrystalline or cryptocrystalline variety of quartz, which means the quartz crystals are too small to be seen without high magnification.
Chalcedony is a gem composed of cryptocrystalline (microscopic) quartz crystals that form in tightly interlocking, fibrous masses. All chalcedonys are semi-translucent to opaque but rarely will eye-clean cut stones be cut form it ...
All the various forms of Quartz, including amethyst, citrine, and the cryptocrystalline forms such as agate, are among the most common of all gemstones.
It is cryptocrystalline, which means that it is composed of very fine crystals that cannot be seen as distinct particles under normal magnification.
Permeable to liquids; those crystalline and cryptocrystalline aggregates which permit the entrance of solu...) ...
Chalcedony is an umbrella term for quartz containing microscopically small crystals, or cryptocrystalline quartzes.
Overview: Chalcedony is member of the quartz family. Chalcedony is the name given to all cryptocrystalline quartz, a complicated name that refers to the tightly packed microscopic crystals that make up the gem.
Chalcedony, which is found worldwide, is the name for a group of stones made of a microcrystalline or cryptocrystalline variety of quartz, which means the quartz crystals are too small to be seen without high magnification.
The SiO2 group includes tridymite, cristobalite, the numerous cryptocrystalline and crystalline forms of quartz, and the amorphous opal. Quartz has the lowest symmetry and the most compact structure of the three SiO2 polymorphs.
There are two forms of quartz; Macro crystalline quartz, which is quartz that is recognizable with the naked eye and Microcrystalline or Cryptocrystalline quartz, which is too small a crystal to be seen without high magnification, such as Chalcedony.
Chemical Composition: hydrous phosphate of copper and aluminum
Crystal System: triclinic (cryptocrystalline)
Hardness: 5-6
Specific Gravity: 2.6-2.9
Geographic Origins: Iran, southwestern U.S.
Cryptocrystalline - Having crystals too small to be seen without a microscope. (Chalcedony)
Cyclical Twin - A twinned crystal made up of multiple individual crystals, often forming a pseudosymetrical form such as a hexagon.
 See also: Crystalline, Quartz, Stone, Gemstone, Color
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