Amethyst is a beautiful stone that is in the quartz family. Amethyst is the most precious quartz mineral and comes in a few distinct colors including violet, purple, rose, lavender and mauve. When it comes to value, the most valuable color is that of a deep purple with tinges of violet. There are many gemstones that are similar in consistency to Amethyst, one of them is Citrine. Citrine is Amethyst that is heated; it turns yellow orange in color. The color of Amethyst was first attributed to manganese, however today; some people attribute the violet color to Ferric Thiocynate. Amethyst is a relatively hard substance. It is rated a 7 on the Moh?s scale which means it is a great stone to make ornamental jewelry out of. However, it should be noted that Amethyst can fracture when hit with too much force, even though it has a rating of 7 on Moh?s scales it is still 1/15 the hardness of a diamond. Amethyst can come in many sizes and while jewelry grade, Amethyst is very rare, other types of Amethyst can be meters long. Yes, meters long. For instance, Amethyst was founded in Mexico in 1900; it measured 33 feet, by 16 feet, by 10 feet and weighed over 8 tones.