Tanzanite Color Grading - So Many Systems, Which to Trust?
The GIA color grading system was the most widely used for years and still is in the B2B trade. Then came the Tanzanite Foundation system, the ICSL system and finally various unofficial systems which have proliferated in the age of the internet. This article will look at each in turn.
Tanzanite: What you need to know about color, rarity, value - Geology.com
Tanzanite is a blue color-variety of the mineral zoisite. Color: Blue to bluish purple to bluish violet. The color of commercial stones is almost always produced or enhanced by heating brown or green zoisite. Strong pleochroism: dichroism and trichroism.
Tanzanite Grading & Color Grades Chart
This color grading system and chart was developed by the Tanzanite Foundation, www.tanzanitefoundation.org The color quality is based on the degree of saturation with greater value placed on gems with greater saturation. The first color listed is the modifier and the second color listed is the primary color.
GIA Tanzanite Color Grades: “VB 6/6” Tanzanite explained
GIA Tanzanite Color Grades: “VB 6/6” Tanzanite explained. Gemologists using the GIA Colored Stone Grading Scale will grade fine-colored tanzanite as “GIA 5/6”. Its rich and vibrant color is highly valued and universally appreciated.
Understanding the GIA Color Grading Process For Tanzanite
The color of a fine, 1.00 carat tanzanite is likely – at its darkest – to be a medium blue or GIA 5/5. Consumers should be wary of online retailers selling smaller stones (between 0.50 to 2.50 carats) as “investment grade” or GIA 6/6.
Tanzanite Clarity Grading - How to Judge Clarity in Tanzanite
Unlike Diamonds, colored stones do not have a universally accepted clarity grading system. We take a look at some of the most widely used systems. With Tanzanite clarity grading, common sense prevails. In general terms, the cleaner, less included the Tanzanite the finer the quality.
GIA Tanzanite Color Grades: Understanding “VB 6/6”
2024年10月8日 · The GIA grading system evaluates gem color based on three components: Hue: This reflects the basic colors we perceive. When discussing a gem’s “color,” most people refer to its hue. Tone: This indicates a gem’s relative lightness or darkness on a scale from 2 to 8. Saturation: This describes the hue’s intensity on a scale from 1 to 6.
Tanzanite Grading
Tanzanite is graded according to Colour, Clarity and Carat weight. The higher the combination of these characteristics, the more rare and valuable it is. There is also a further consideration; Confidence that comes with the certification that guarantees colour, clarity and exceptional quality.
What Is Tanzanite Gemstone | Tanzanite Stone - GIA
Tanzanite is available as fine, larger pieces with strong color or lighter material cut to standard sizes for use in mass market jewelry. Tanzanite color is less saturated in smaller sizes. Gems must be above 5-cts. in size to have deep, fine color.
A Full & Informative Guide to Tanzanite Grading - Gemporia
2024年10月3日 · These Tanzanite stones are graded as A (light), AA (moderate), AAA (intense), or AAAA (vivid), depending on the hue, tone, and saturation of the stone. Generally, the more intense the saturation, the higher the grade it will receive. …