Crystallography Topology @ Jewel Info 4 U
By:Ritika
Summary: Crystallography refers to the analysis of atoms in crystals and topology refers to the study of distortion and invariant connectivity characteristics of mathematical objects.
Crystallography of Gemstones: The Crystal System
Crystalline (Crystal Lattice) Structures
Structural Properties of a Crystal ...
Crystallography is easily divided into 3 sections -- geometrical, physical, and chemical. The latter two involve the relationships of the crystal form (geometrical) upon the physical and chemical properties of any given mineral.
Crystallography is the scientific study of crystals.
Articles in category "Crystallography"
There are 45 articles in this category.
Crystallography
The science of the internal structure of crystals.
Cubic System
The Isometric crystal system which consists of three axes, each of equal length and perpendicular to others.
CRYSTALLOGRAPHY. The science which describes or delineates the form of crystals.
CRYSTALS. Trade term for fourth grade cut diamonds; colourless diamonds.
CULASSE. Portion of brilliant-cut diamond below the girdle.
Crystallography fans will want to check out NASA scientist Peter Wasilewski’s ice crystal “frozen visions,' or Frizions.
AGTA-GTC on Paraiba Tourmaline ...
Crystallography
The internal structure of a diamond (usually as octahedron, tetrahedron, cube or rhombic dodecahedron) that has a direct influence on its external morphology.
Culet ...
2 History
3 Crystallography & Properties
4 Online G&G articles on corundum
Definition ...
The discipline of crystallography has developed a descriptive terminology which is applied to crystals and crystal features in order to describe their structure, symmetry, and shape.
Crystallography: monoclinic, prismatic (not over 1"); frequently massive in other rocks
Colors: black, brown or green on thin edges Luster: glassy
Hardness: 5 to 6
S.G.: 3.2 to 3.4
Cleavage: perfect
Fracture: uneven
Occurrence: common in U.S.
crystallography The science and study of crystal structure. Person who studies crystallography is a crystallographer. Ct. Abbreviation for carat cube Six sided polyhedron; all sides are equi-dimensional and bisect at 90º.
You can get into gemstones and study their mineralogy, geologic origins, internal crystallography, stone identification and so many other related topics.
Crystallograpy: It is beyond the scope of this introductory course (and beyond your instructor's ability) to delve deeply into the complex and rigorous field of scientific crystallography, however; ...
By color, species names & crystallography
Colors:
Colorless, yellow, olive green, cinnamon brown, violet brown, pale violet to reddish violet, and blue.
Physical Properties of Gemstones
The Crystallography and Forms of Gemstones
Types of Gemstone Deposits
Sources of Gemstones
Doublets, Coated Stones And Foilback
Identification By Double Refraction & Pleochroism ...
Dietrich (1983) Mineralogy (Second Edition) Freeman (San Francisco). This is a revision of an older standard text and belabors morphological crystallography at the expense of structural crystallography and is not well integrated with modern geology.
Overview: Hauyne gets its name from a well renowned French mineralogist, René Just Haüy (1743-1822), the discoverer of crystallography.
Its chemical composition is simple: pure crystallized carbon referable to the cubic order of crystallography. It is formed in volcanic craters and dispersed by volcanic eruption or flooding.
The study of the new, rare species being found there in the early 19th Century helped develop the fledgling sciences of mineralogy and crystallography.
Database of Minerals
Created by David Barthelmy, webmineral.com lets you search for thousands of minerals by crystallography, classification, composition, color, or name. Good photos, too.
Mineralogy Database - complete database of minerals with their chemical, physical and optical properties with Dana & Strunz classifications. Excellent new crystallography section. David Barthelmy.
Face (a) A term used in brillianteering for the entire group of facets that can be placed won a diamond without reposition it in the dop; vis., two star facets and four upper-break facets or four lower-break facets. (b) In crystallography, a natural, ...
More complete and up-to-date than Pough's Field Guide to Rocks and Minerals, less cumbersome than Dana's Textbook of Mineralogy. This is the best all around reference for identifying minerals as well as the fundamentals crystallography, chemistry, ...
 See also: Crystal, Gemstone, Gemstones, Color, Diamond
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