The Gemological Institute of America supports the gem and jewelry industry by setting practice standards for its professional members. GIA notes that it sponsors education and research programs that encourage the public's trust in their jewelry and gem purchases. GIA may best be known for its diamond-grading system.Know More
Many consumers use diamond grades determined by GIA's Cut Grading system to compare the qualify of stones they're considering purchasing. Such characteristics as shape, color and clarity factor into a stone's grade.
To further educate the public, GIA maintains a comprehensive online encyclopedia consumers may search by color or nation of origin to learn a stone's characteristics. Buying guides linked to the encyclopedia offer information consumers need to make smart purchase decisions.
GIA offers industry professionals a wide variety of education and certification programs. The organization notes that its programs range from diamond and colored-stone buying and grading to stone identification, equipment and instrumentation, and markets and supply chains. Those who complete education requirements earn certifications such as GIA Graduate Gemologist and Accredited Jewelry Professional, or diplomas such as Jewelry Design & Technology.
GIA's "Gems & Gemology: The Quarterly Journal of the Gemological Institute of America," publishes gem-related research and other articles of interest to industry professionals. It covers the scientific and technological aspects of jewelry and gemology and delves into business topics.Learn More
The refractive index of toluene is 1.496 at 20 degrees Celsius. From Snell's law, the refractive index of toluene is the ratio of the velocity of light in a vacuum to the velocity of light in toluene.Full Answer >
The two main methods of mineral formation are cooling and evaporation. The cooling process occurs when magmas and lavas cool and crystallize into minerals. Minerals formed through evaporation are the result of electrically charged atoms, known as ions, linking together to form crystals.Full Answer >
Jasper derives from quartz; the mineral is found throughout the world and is not commonly treated or enhanced when mined. Jasper is a beautiful mineral with captivating color patterns and formations. Although it can be solid in color, jasper is typically spotted, striped or ringed. Each jasper stone possesses a unique pattern or color scheme, making it one of the most unique gemstones.Full Answer >
Examples of ferrous metals include carbon steel, mild steel, stainless steel, cast iron and wrought iron. Any metal that has iron as the main metal in its composition is considered to be ferrous.Full Answer >