AMETHYST[GEM]

Amethyst is a violet variety of quartz often used in jewelry. The name comes from the Ancient Greek ἀ a- ("not") and μέθυστος methustos ("intoxicated"), a reference to the belief that the stone protected its owner from drunkenness; the ancient Greeks and Romans wore amethyst and made drinking vessels of it in the belief that it would prevent intoxication.

Detailed description
Amethyst is the violet variety of quartz; its chemical formula is SiO2.
In the 19th century, the color of amethyst was attributed to the presence of manganese. However, since it is capable of being greatly altered and even discharged by heat, the color was believed by some authorities to be from an organic source. Ferric thiocyanate has been suggested, and sulfur was said to have been detected in the mineral[citation needed].

It is now known why amethysts are purplish : the color in amethyst is due to irradiation, which caused the iron ions present as impurities in quartz to rearrange themselves in the crystal lattice affecting the color in a reversible process.[1] Synthetic amethyst is thus man-made by gamma-ray, x-ray or electron beam irradiation of clear quartz which has been first doped with ferric impurities.

PRICE

$199580.48/KG OR $90718.4/IB

For more information:

mobile: +2348039721941

e-mail: emeabau@yahoo.com

website: www.franchiseminerals.com

contact person: emeaba uche




Comments

Post a Comment

Popular posts from this blog

AGATE[GEM]

Image
Listing description Agate (pronounced /ˈæ ɡə t/ ) is a microcrystalline variety of quartz ( silica ), chiefly chalcedony , characterised by its fineness of grain and brightness of color. Although agates may be found in various kinds of rock, they are classically associated with volcanic rocks but can be common in certain metamorphic rocks . [1] Detailed description Etymology and history The stone was given its name by Theophrastus , a Greek philosopher and naturalist, who discovered the stone along the shore line of the river Achates ( Greek : Ἀχάτης ) sometime between the 4th and 3rd centuries BC. [2] Colorful agates and other chalcedonies were obtained over 3,000 years ago from the Achates River, now called Dirillo , in Sicily . [3] Ancient use Agate is one of the most common materials used in the art of hardstone carving , and has been recovered at a number of ancient sites, indicating its widespread use in the ancient world; for example, archaeological recovery a...
Read more

ALEXANDRITE

Image
The alexandrite variety displays a color change ( alexandrite effect ) dependent upon the nature of ambient lighting. This color shift is independent of any change of hue with viewing direction through the crystal that would arise from pleochroism . Both these different properties are frequently referred to as "color change", however. DETAILED DESCRIPTION The alexandrite variety displays a color change ( alexandrite effect ) dependent upon the nature of ambient lighting. This color shift is independent of any change of hue with viewing direction through the crystal that would arise from pleochroism . Both these different properties are frequently referred to as "color change", however. Alexandrite results from small scale replacement of aluminium by chromium ions in the crystal structure, which causes intense absorption of light over a narrow range of wavelengths in the yellow region of the spectrum. Alexandrite from the Ural Mountains in Russia is gree...
Read more

TOURMALINE(RUBELITA)GEM

Image
Listing description : MINERALOGY:  The  pink tourmaline , also known as rubelita originates primarily in plutonitas acids, specifically  pegmatite , where forms large  crystals . Through the action of gases containing  boron, from the magma of the host rock, tourmaline it can also arise as inclusion neumatolítica  ( generated depth of the crust (Plutonism) by intrusion of magma, which causes alteration in petrographic composition of the invaded rocks ) then the crystals are included heavily on rock, the  pink tourmaline  consists of different mineral elements, but always has the same structure, the metals are always included in tourmalines and are causing varieties this mineral colors,  the pink tourmaline carries traces of manganese  that is what gives her cute pink. Detailed Description: MYTHOLOGY:  It was found in the Minas Gerais (Brazil)  crystal pink tourmaline (rubellite) of 109 cm.  pink tour...
Read more