A Review of Gemstone Definitions - Emporia State University

A Review of Gemstone Definitions - Emporia State University

A Review of Basic Gemstone Introductions & Definitions By Brandon Milner Edited/Enhanced by Susie Aber Getting Started! Come to class &… Online Syll...

248KB Sizes 0 Downloads 6 Views

Recommend Documents

Olivine! - Emporia State University
Olivine has… ➢a chemical formula of (Fe, Mg)SiO4 . ➢a series of minerals and generic formula, M2. SiO4 where M= Ca

Winter 2010 - Emporia State University
C. (Coad) McCormick. (BSE'45). Twilah M. (Seefeld) McFarland. (BSE'46,BA'46). .... Beverly J. (Merwin). Stolfus (FS'47).

nature poetry - Emporia State University
The Owl and the Pussy-Cat. 9. Stands the lilac-bush tall-growing. 10 like moonbeams on a river. 11 purple mountain majes

kansas woodpeckers - Emporia State University
cockaded Woodpecker in the southeast. ... ween the Old and New Worlds. .... In flight, the Red-bellied Woodpecker shows

Ad Astra - Emporia State University
And it's the type of question that William Forrester, the reclusive novelist played by Sean Connery in the film “Findi

BK 51492 all pages - Emporia State University
Richard. Leet (BSE '69), Ness City, is a high school math teacher at Arkansas ...... loss of teammate Randall Knox, who

The Savvy Psychology Major - Emporia State University
The media often portrays today's college-bound generation as clueless slackers who lack the knowledge (i.e., are clueles

Minerals to Gems - Emporia State University
There may be a glimmer of hope,. But nothing compares to the sparkh'ng airs,. Ofa diamond or a garnet called pyrope! Wha

Understanding Russian Names - Emporia State University
Common nicknames derived from Russian names include Vanya for Ivan (as in ... 15th-century Ivan III the Great and 16th-c

The theatre student handbook is a supplement to the Emporia State University. Undergraduate Catalog, which is the author

A Review of Basic Gemstone Introductions & Definitions By Brandon Milner Edited/Enhanced by Susie Aber

Getting Started! Come to class &… Online Syllabus with links to lectures http://academic.emporia.edu/abersusa/go340/syllabus.htm Final Course Project http://academic.emporia.edu/abersusa/go340/webpage.htm

Gem Quiz http://academic.emporia.edu/abersusa/go340/gemquiz.htm Gem Definitions & History http://academic.emporia.edu/abersusa/go340/define.htm Gem Briefs http://academic.emporia.edu/abersusa/go340/gembrief.htm

Gemology/Gemstones • Gemstone: Stones that are for personal use and desired for beauty, rarity, durability, and stability. • Only 70 minerals are classed as gemstones; 20 of these are common.

• Gemology: Science of gems based on Chemistry/Physics/Geology.

Mineralogy/Mineral • Mineralogy: Study of minerals based on crystalline structure, chemical composition, origin, occurrence and associations. • Mineral Characteristics: • Naturally Occurring • Homogenous • Solid • Fixed Chemical Composition • Fixed Crystalline Structure • Inorganic

Mineralogy/Mineral Cont. • • • •

Natural: Not made in a lab. Homogenous: Is the same throughout. Solid: No liquid or gas phases. Defined Chemical Composition/Crystalline Structure: Fixed composition/geometric pattern. • Inorganic: Made by chemical/geological processes. • Mineraloid: Mineral that lacks part of these qualifications.

Gemology/Gemstones Terminolgy • Beauty: Color, Luster, Transparency, cutting properties. • Durability: Resistance to scratching and breaking. • Tenacity: Resistance to breaking. • Hardness: Resistance to scratching. • Stability: Ability to retain original color and properties.

Basic Value & Grade Figure right taken from Barbara Smigel (2008) www.bwsmigel.info/Lessons1and2/DEBasicTerms.html

• Rarity: Limited supplies can raise price and demand. Higher demand can help to find new discoveries. • Demand or Fad: Prices depend on what current fads or fashions are currently in style. • Portability: Prices are high based on the size of the gemstones relative to other objects.

Gem Naming/Classification • Divide gems as diamonds and colored stones NOT precious and semiprecious stones. • Gemstones named from: Color, Origin, Properties, Characteristics, People, Special names to promote although sometimes misleading. • New gemstones must be authorized by Commission on New Mineral Names of the International Mineral Association.

Gemstone Classification • Inorganic Types • Groups: Similar Properties/Structures. • Species: Similar Structures/Compositions. • Variety: Similar Colors/Optical Properties. Examples-color, transparency, refraction.

• Organic Types • Chemical Compositions: This would include gems such as Jet or Ivory.

Synthetics/Imitations • First started in 1800’s due to high demand. • Examples include Diamond, Spinel and Opal.

• Synthetic: Made to have identical properties of real gem. • Imitation: Made to look like the real gem without identical properties.

Basic History of Formal Gem Education • Gemstones course first taught at a Colorado university in 1909. • Gemological Society of America founded in 1930 by Robert Shipley. • GIA offers courses in gem/bead identification, value, designing and sales. • GIA is a non-profit organization based on money from public services and publications. • Plentiful educational opportunities concerning gemstones.

References & Links! Aber, S. 2011. Some Basic Definitions and History. http://academic.emporia.edu/abersusa/go340/define.htm Gemological Institute of America. http://www.gia.edu/ Lewton-Brain, C. 1993. On Jewellery Career Options. http://www.ganoksin.com/borisat/nenam/career.htm Olson, D. W. 2002. An Overview of Production of Specific US Gemstones. US Bureau of Mines Special Publication 14-95. http://minerals.er.usgs.gov/minerals/pubs/commodity/gemstones/sp1495/index.html Synthetic & Simulant http://minerals.usgs.gov/minerals/pubs/commodity/gemstones/sp1495/synthetic.html Rock & Mineral Collecting http://pubs.usgs.gov/gip/collect1/collectgip.html Natural Gemstones http://pubs.usgs.gov/gip/gemstones/ Annual Gemstone Production http://minerals.usgs.gov/minerals/pubs/commodity/gemstones/ In 2011- http://minerals.usgs.gov/minerals/pubs/commodity/gemstones/mcs2011-gemst.pdf