What determines the Colour of gemstones?
It’s the same with gemstones; each particular mineral absorbs some of the light and refracts some of the light, and the wavelength of that refracted light determines the color that we see in the gemstone. When the gemstone is formed with impurities inside, different impurities can present with different colors.
What are the three major factors that determine the color of a gemstone?
Gemstone color can be broken down into three categories: hue, tone, and saturation. The first factor, hue, refers to the specific color of the stone.
What element makes gems blue?
Ferrous iron (Fe2+) usually gives a blue or green color. Ferric iron (Fe3+) usually gives a yellow or brown color. (The oxidation state affects how iron bonds to neighboring atoms in the crystal). Most well-known jewelry gemstones, including quartz, spinel, topaz, and tourmaline, are allochromatic.
Why are crystals Coloured?
Part of the color seen when looking at a crystal is light. When light enters a crystal its spectrum is broken apart, and part of it is absorbed while other parts are reflected. This changes the apparent color of the crystal.
Why is Moldavite rare?
Why is it so expensive? Moldavite is expensive for a handful of reasons. Firstly, the majority of Moldavite exists in sediments from the middle to Upper Miocene age when the craters fell. Much of it remains deeply buried in the Earth and can only be found in a few regions along with the impact of the craters.