It is a metastable allotrope of Carbon known as crystal lattice. The color ranges from clear transparent white to yellow.
Diamonds mines are located around the world with higher concentration in North America, West, South and Central Africa and Russia.
Color variations may naturally occur in diamonds creating hues of Brown, Yellow, Orange, Red, Purple, Violet, Pink, Blue, Green, Grey and Black.
Trace elements of Nitrogen, Boron or Hydrogen, structural irregularities or graining, and natural radiation may cause the color variations.
It is a green variety of the mineral Beryl that contains traces of either Chromium or Vanadium that cause the green coloring.
Colombia is the world's largest producer toghether with Brazil and Zambia however they are mined all around the world.
It is a variety of the mineral Corundum that has trace elements of Chromium. Rubies occur in Pink and Red ranging from deep to highly saturated hues.
A variety of this mineral presents asterism and it is named Star Ruby.
They are mined in South America, Africa, Central Asia and Far East.
It is a variety of the mineral Corundum that has trace elements of either Iron, Titanium, Chromium, Vanadium, or Magnesium.
Sapphires occur in blue or fancy yellow, purple, orange, and green. Its Orange-Pink variety, Padparadschah, and the Star Sapphire are the rarest.
It is a Chrysoberyl, an aluminate of Beryllium that vaires in color ranging from green to raspberry red.
Its peculiarity is how the color shifts based on the different viewing angles and light exposure as well as when under natural or artificial light.
It is a violet variety of Quartz, a silicate mineral with colors that vary from light to dark purple up to intense violet.
It is mainly mined in South America, but it may also be extracted in Africa, Afghanistan, South Korea, North and Central America.
It is a blue variety of the mineral Beryl that contains traces of Iron which affect its color to range from a very light blue to a richly saturated blue.
Brazil has the largest deposits of Aquamarine which is also mined in many regions of Africa, Pakistan, Russia, Sri Lanka and USA.
It is a yellow variety of Quartz, a silicate mineral with colors that vary from light to dark yellow up to intense golden-yellow.
Its color vairations are caused primarily by the iron content and it is primarily extracted in Brazil.
It is a nesosilicate mineral that includes tsavorite and that occurs in most colors, the rarest being its blue variations.
There are pipes of this mineral in Africa and South Asia mainly, however different subgroups are extracted also in North and South America and Russia.
It is a variety of the mineral Beryl and it is also known as Rose Beryl as it comes in different shades of pink as well as orange and yellow hues.
Originally discovered in Madagascar, its name was attributed to one of its largest collectors, the financier J.P.Morgan.
It is a mineraloid as it does not present a crystal formation; it is an hydrated amorphous form of silica. It may be transparent, translucent or solid.
It has numerous variations like Boulder, Fire and Hungarian Opal. Its color peculiarity is that it changes based on the viewing angles and the light.
Peridot, also know as Chrysolite, is a gem quality Olivine silicate mineral, a Magnesium rich variety of Forsferite, and it occurs in silica-deficient rocks.
The colors range from yellow to yellow-green, olive-green to lime-green, and seldom it may reach emerald green hues.
It is a mineral with crystal formation made up of atoms of silicon and oxygen that when contaminated by various impurities produce a wide range of colors.
The family of Quartz includes Amethyst and Citrine as well as the Smoky, the Rose, the Lemon and the Milky Quartz, Rutilate, Ametrine and Prasiolite.
It is a recently discovered variety of the Zoisite, a calcium aluminium hydroxy sorosilicate with traces of Vanadium that cause the blue to violet color.
Pipes of Tanzanite, as named by Tiffany & Co., have only been located in Tanzania; the mineral is extracted in the Arusha region of the African country.
It is a nesosilicate mineral of Aluminium and Fluorine and it occurs in a variety of different colors that range from yellow to blue.
It is extracted across the world including Europe, North America, Central America, South America, Central Asia, Australia and Japan.
It is a crystalline Boron silicate mineral with traces of Aluminium, Iron, Magnesium, Sodium, Lithium, or Potassium.
The mineral variations include Rubellite and Verdelite; the neon-blue Paraiba color variety mined in Brazil is the most praised variance of this mineral.