Tanzanite is basically the Blue variety of "Zoisite". Tanzanite, discovered in Tanzania in 1967.
Quartz is one of the most common and varied minerals on earth, and its abundant colors produce many gemstone types.
Blue calcite in Tanzania is found in Babati District within the Arusha Region.
Calcite crystals are trigonal-rhombohedral, though actual calcite rhombohedra are rare as natural crystals.
The pink colour of rose quartz is caused by minute traces of titanium in the atomic lattice of the crystals.
Agate is a cryptocrystalline variety of the mineral Quartz . Quartz is the most abundant single mineral on earth.
A very small number of garnets are pure and flawless enough to be cut as gemstones.
Yellow Opal, Black Opal,
Brown Opal, White Opal,
Tourmaline is a large family of Gemstones with more than 100 hues available. Its name comes from the Sinhalese turmali, meaning mixed Gemstones.
Celebrated in the Bible and in ancient Sanskrit writings as the most precious of all gemstones,
Amethyst, a member of the Quartz mineral family, and has Purple hues that vary from very pale to dark.
Rhodolite is the name used to describe the lovely pinkish, purplish or lavender Red Garnets which are a mixture of Almandite and Pyrope.
Citrine includes yellow to gold to orange brown shades of transparent quartz. Citrine can brighten almost any jewelry style.
Tourmaline is generally thought of as green, but can be almost any colour.
Quartz is the most abundant single mineral on earth. It makes up about 12% of the earth's crust.
Chalcedony occurs in a wide range of varieties. Many semi-precious gemstones are in fact forms of chalcedony.
Apatite provides attractive gems in a variety of colors : green but also yellow,blue, reddish, brown and purple.
Aquamarine ranges in color from light to deep Blue.Aquamarine achieves its Blue to greenish Blue color from Iron in the ferrous state.
Chrysoprase, chrysophrase or chrysoprasus is a gemstone variety of chalcedony (a cryptocrystalline form of silica)
Feldspar is the mineral name given to a group of minerals distinguished by the presence of aluminum
Green Aventurine Quartz, is actually a quartzit, It is a rock, not a mineral.
Named after P. Cordier, a French geologist. Cordierite is also known as iolite and dichroite.
The name Malachite is derived from the Greek word "Malakhe" which means marshamallow plant because of the green color.
Moonstone occurs in blue, but it also occurs in grey, white, pink, green and brown.It is usually polished as a cabochon,
Celebrated in the Bible and in ancient Sanskrit writings as the most precious of all gemstones, It has been the prized
DESCRIPTION: Two compact, massive, zoisite-rich rocks have found use as gemrocks:
Rutile or titanium oxide (TiO2) is a mineral that typically forms in long thin needles. Rutile is known cause the stars in stones such as ruby and sapphire,
pessartite garnet named after the Spessart district in Bavaria, Germany.
At first sight it has a resemblance to aquamarine, but aquamarine always displays a strong pleochroism from blue to greenish blue,
Tourmaline is a large family of Gemstones with more than 100 hues available.
Obsidian, natural glass of volcanic origin that is formed by the rapid cooling of viscous lava.
Zircon's name comes from the Arabic zargoon, meaning vermilion.
Kyanite, whose name derives from the Greek word kuanos sometimes referred to as "kyanos",
Spinel is a hard vitreous magnesium aluminium oxide that has been used as a gemstone for centuries.