Wanting to know the Hue and Tone factor in Gemstone Purple Amethyst?
Amethyst occurs in a continuum of primary hues from a light-toned slightly pinkist violet to a deep concord grape purple of amethyst shade. Amethyst is expected to be eye-clean and given its relatively low cost, should always be finely cut for market standards of amethyst.
Amethyst may exhibit one or both of two possible secondary hues, red or blue. A light rosy red, what we think of as pink, is the usual secondary hue found in lighter-toned stones. The ideal tone for amethyst is between seventy five and eighty percent; at this tonal level the secondary hue, if there is one, will be blue. The color in amethyst may occur in overlapping zones of purple and blue. When the stone is viewed face up, the color will be a slightly (ten to fifteen percent) bluish purple. The blue adds a velvety richness to the purple hue.
Low price amethyst (cabochon and beads) quality come cheapest which come extremely dark (almost black) and available in big quantities. For Example 10mm round natural amethyst beads dark quality you will get in 4$ per strand. See in picture the lowest quality one, you can easily judge the lowest quality by seeing dark color which never show any hue. Mostly beads are made of this type of quality.
Writting Original articles by Navneet Gems and Minerals, the source of Semi-Precious and Precious Gemstones, specializing in Semi-precious Gems from Bangkok, straight from our factories in India and Thailand.