Amethyst Mineral Gallery

The descriptions include searchable mineralogical data plus other information of interest to students and rock hounds.

Amethyst mineral gallery.

Fluorite is well known and prized for its glassy luster and rich variety of colors. Only a select few of the most famous localities will be mentioned here. Piedras parado and las vigas de ramirez both in veracruz. Minerals can be organized mainly according to their chemistry into the following classes.

Amethyst galleries mineral gallery describes over 600 mineral species and 5 000 specimens see our new specimens last updated 23 jan 2015 and what s new last updated 03 sep 2014 together with several ways of accessing these descriptions. A list of the primary chemical classes used to organize mineral species. Amethyst galleries mineral gallery minerals. Amethyst is sometimes heat treated to deepen the color or to transform it into citrine.

The most common minerals. The range of common colors for fluorite starting from the hallmark color purple then blue green yellow colorless brown pink black and reddish orange is amazing and is only rivaled in color range by quartz. Fluorite is a mineral with a veritable bouquet of brilliant colors. Amethyst a transparent coarse grained variety of the silica mineral quartz that is valued as a semiprecious gem for its violet colour.

Some estimates place quartz at 21 of the earth s total lithosphere. And amatitlan in guerro they occur in elongated crystals that are rarely faceted since collectors pay well for these. Quartz is undoubtedly the single most common mineral in the earth s crust ranging from perhaps 12 of continental crust to as much as 50 of oceanic crust as indicated by the composition of spreading ridge volcanic lavas. Amethyst is a very common mineral and is found worldwide.

By class carbonates elements halides oxides. Amethyst is the purple variety of the mineral quartz and is its most famous and valuable gem variety quartz also contains other gemstones such as citrine rose quartz and smoky quartz the color of amethyst is most often caused by iron impurities though it can also be colored by natural radiation exposure. Its physical properties are those of quartz but it contains more iron oxide fe 2 o 3 than any other variety of quartz and experts believe that its colour arises from its iron content. Tall prismatic well shaped crystals are restricted to several mexican localities.

The world s largest gallery of gems minerals fossils and other natural history products check out our brand new natural history inventory just added to our website. Feldspar a group of related minerals comprises the bulk of the earth s. Amethyst can occur as long prismatic crystals that have a six sided pyramid at either end or can form as druzes that are crystalline crusts that only show the pointed terminations.