Crystalline (Crystal Lattice) Structures
Structural Properties of a Crystal ...
Crystalline gems have a specific chemical formula, and a well defined, highly predictable internal structure, known as a crystal lattice.
Crystalline quartz is quartz that occurs in distinct crystals. It occurs in a number of familiar varieties distinguished by color.
Crystalline: meaning large single crystals of aggregates of individual crystals. Having the hexagonal shape or habitat of the mineral. (Rose quartz is a minor exception as it rarely forms good crystals.) ...
crystalline (adj) of or like crystal, formed by crystallization.
crystallization (v) the process of forming a crystal structure.
Crystalline
Having a regular crystal structure.
Crystallography
The science of the internal structure of crystals.
Crystalline - Formed by crystallisation, or similar to crystal in texture
Cuff link - A decorative fastener worn to close the French cuff (a cuff without buttons) of a shirt ...
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.
The Crystalline Connection
When we discovered crystals a number of years ago our lives changed.
macrocrystalline Having crystals large enough to be seen with an unaided eye. mafic Describing dark colored rocks or minerals that are composed particularly of magnesium and iron.
MICROCRYSTALLINE
Microcrystalline is a type of mineral structure in which the crystals are so small that they can only be seen using a microscope.
MICROMOSAIC ...
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 ...
Crystalline structures occur in all classes of materials, with all types of chemical bonds. Almost all metal exists in a polycrystalline state; amorphous or single-crystal metals must be produced synthetically, often with great difficulty.
Crystalline quartz varieties
Amethyst is the queen of the quartz varieties and in better qualities it is the most expensive of the quartzes. Amethyst ranges from pale to dark violet.
Crystalline lattice refers to the atoms in a crystal that are arranged in a regular repeating pattern. The property or attribute of a crystal is highly determined by its lattice.
Crystalline crusts of blue-green langite have formed on the walls of this Victorian copper mine in the decades since it was abandoned.
Crystalline: A substance that is either composed of crystals or that resembles crystals in structure.
Crystallize: To cause a material to form crystals of to take on the structure of crystals.
A crystalline inclusion looks quite different from a cloudy inclusion of the same size. How, for example, can a foggy cloud be measured, in which each particle is less than five micron?
A crystalline mineral used for gems, usually colorless and transparent.
R
Rhinestone ...
A crystalline mineral used for gems, including amethyst and rock crystal. Available in a variety of colors.
Radiant Cut ...
The crystalline form of the Anakie sapphires is fairly typical. The hexagonal pyramid is common, but the prism is comparatively rare. The usual rhombohedral form also occurs, and crystals are frequently terminated by a basal plane.
All crystalline minerals consist of atoms packed in geometric arrays; the arrays, called crystal structures, are divided into seven crystal systems based on the symmetry of their atomic geometries.
Fully Crystalline Quartz
This group includes rock crystal, amethyst, citrine, cairngorm and smoky quartz.
Quartzite
Quartzite is composed of an interlocking mass of quartz crystals with irregular boundaries, produced by metamorphic processes.
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.
A crypto-crystalline sub-species of quartz. It is generally of a milky brown colour, but there are also rarer blue (blue chalcedony), green (chrysoprase) and orange-red (cornelian) varieties. Very occasionally it may be transparent.
A crypto crystalline subspecies of quartz, such as agate, onyx, carnelian, jasper
Channel setting
Stone set between two bars of metal with their edges almost touching ...
A complex crystalline silicate containing aluminum, boron, and other elements.
Trained Grader
A person who has a basic understanding of gem grading, but does not have the advanced experience of a skilled grader.
Nacre - The crystalline substance secreted by a mollusk that coats the irritant, eventually producing a pearl.
Natural - Any pearl that is not cultured. Any gemstone that has not been color or clarity enhanced.
Silica: Crystalline silica is the scientific name for a group of minerals composed of silicon and oxygen. The term crystalline refers to the fact that the oxygen and silicon atoms are arranged in a three-dimensional repeating pattern.
Minerals Are Crystalline: substances that have a distinct recipe and arrangement of atoms.
Gahnite - as crystalline specimens were reported by D.O.T personnel during the blasting, though positive identification has not been made to date.
Hematite - many bladed crystals up to ½ inch found on one specimen.
Nacre: A crystalline substance that coats the mantle or nucleus within the oyster to form a pearl.
The beautiful crystalline amethyst has always made an impactin jewelry designs.
Amethysts were often set in small rings, earrings andpendants combined with pearls in the Victorian era.
Opal is a non-crystalline gem that is formed in the ground when silica is liquefied and washed into fissures in the surrounding rock where it solidifies into a hardened gel.
Non-crystalline, iridescent silica.
Oxidation
(Antiqued) Darkening or other color changes of metal which is accelerated by humidity, especially salty air or the presence of acidic perspiration.
A smooth hard crystalline substance composed of microscopic crystals of calcium carbonate. A mollusk secretes this substance and uses it to coat an irritant that has become lodged in its soft inner body.
nacre
The crystalline substance made of aragonite and calcite crystals bound together by conchiolin, which mollusks like oysters secrete around foreign objects within their shells, layers of which eventually form a pearl ...
A type of microcrystalline quartz with hydrated silica (opal). It appears naturally in bluish greys to brownish-reddish colors to white or cream. Because of its molecular structure, it is very porous and easy to dye.
A branching, crystalline structure of native copper. Individual crystals are octahedral and dodecahedral.
A sample of malachite.
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Marcasites Crystalline pyrites cut to look like diamonds. Made through the 1700s and 1800s. Later 1900s marasites are made from cut metal or cut glass.
Corundum A crystalline form of aluminum oxide known in the gemstone world as ruby and sapphire. It is naturally clear, but can have different colors when impurities are present.
SulfidePyrite (crystalline)
FeS2
Most distinguishing features:
Colour, hardness, streak and habit are best indicators. Gives off sparks when struck with a hard metal object.
A form of Macrocrystalline quartz. It can be found in Brazil, India, China and Japan. Most Aventurine is reddish brown to yellow in color with shimmering metallic particles called mica throughout the stone.
This amazingly crystalline, perfectly cut, untreated natural “gem' is a perfect combination of fiery pink with a kiss of orange.
Is Sub-categorized into two different areas: Macrocrystalline quartz and Cryptocrystalline quartz.
The Macrocrystalline quartz can be seen by the naked eye.
Agates are microcrystalline quartz.
Generally, agates are found in two different types.
Solid color stones are the ones that are commonly
dyed or heat treated; these include blue and green
agates, and also the very popular carnelian and ...
Widmanstatten A crystalline pattern seen in iron meteorites after acid etching
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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.
Zircon is a natural crystalline gemstone, which is older than diamond and is available in a pallet of colors. It is a very primitive stone whose age is approximately 4.404 billion years.
Diamonds, a form of crystalline carbon, are prized because they are exceptionally hard and durable, have high refractivity and brilliance, and because really fine diamonds are rare.
AgateAgate is a variety of chalcedony (a family of microcrystalline quartz). AigretteAn aigrette (meaning "egret" in French) is a feather-shaped piece of jewelry that is worn in the hair or on a hat.
A class of microcrystalline quartz that includes agate, jaspers, tiger eye, bloodstone, sardonyx, chrysoprase and others. Petrified wood is also sometimes composed of chalcedony that has replaced the original organic material.
Citrine ...
Onyx is a species of chalcedony (microcrystalline quartz).
- OPAL
Opals are semi-precious stones that are luminous and iridescent, frequently with inclusions of many colors ("fire").
To protect itself, the oyster coats an intruding object or grain of sand with nacre, a crystalline substance that builds up over time, resulting in a shimmering, iridescent creation. The culturing process developed by man mimics nature.
Permeable to liquids; those crystalline and cryptocrystalline aggregates which permit the entrance of solu...) ...
The crystalline structures are especially beneficial in these areas. It removes tendencies toward avoidance or denial, ...
 See also: Crystal, Stone, Color, Mineral, Gemstone
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