Most large crystals of calcite are from Helgustadir and Reydarfioerdur, Iceland. These are three ex

A crystal aquamarine well 61 kilograms was found in Brazil, near Belo Horizonte. At the American brabantia bins Museum of Natural History in New York (USA) is instead preserved a sample of 4438 carats egg-shaped faceted. At the Smithsonian Instituion you can admire a beautiful faceted gem of 25 x 10 cm.
The main processing center Agate is located near Idar Oberstein, a town in the valley of the river Nahe, Germany: here, by the middle of last century, brabantia bins with this gem are produced many different objects, from earrings to handles brabantia bins umbrella. Agate clothed among ancient peoples the meaning of protective stone and charms. From it were obtained amulets. Zodiac sign Aries and TWINS.
This gemstone is sometimes confused with turquoise or with some giadeiti. Its name refers to the Amazon River, in South America, and was originally reported to jades and other minerals brabantia bins green zone: it is curious to note that in this area have never been reported brabantia bins deposits of amazonite. Zodiac TORO and SCALE.
The real genesis of this substance has long remained unknown, despite the original and bizarre hypothesis of the ancients: you thought it was urine lynx solidified, but that resulted from a strange process of condensation of the rays of the setting sun. However the Greeks noticed brabantia bins his peculiar characteristic of electrically charged when rubbed with a cloth; such property contributed to spread particular beliefs about healing abilities of amber, which was considered very suitable for the treatment of nervous diseases and respiratory tract.
In Egypt and Asia Minor, since 3000 BC, the amethyst was one of the gems used in the creation of jewelry, seals and fine carvings. The ancient Greeks, however, believed that amethyst constituted an excellent remedy against the effects of alcohol, from which the name amethistos ("rejecting drunkenness"). The main symbolic meaning of amethyst is still to sacral and religious fact is mentioned in the pages of the Bible as one of the twelve stones placed on the chest that kept the names of the twelve tribes of Israel. In the Middle Ages, then, became the gem stone of cardinals and bishops - considered a symbol of peace, humility, chastity and detachment from earthly world - as well as representing the color of the passion of Christ.
In the organic world apatite plays a vital role as a mineral component (colloidal crystals or ultramicroscopic) of bones and teeth. This is also important to paleontological ended, since the ossification of bones in some sediments can be via a partial or even total replacement of the organic molecules of the bones themselves to work fine crystalline apatite.
Palazzo Pitti, Florence, houses the Museo degli Argenti, a very valuable collection of objects in silver brabantia bins and other precious metals, gems and cameos. You can also admire the vases in semi-precious stones belonging to the collection of Lorenzo the Magnificent.
At the British Museum in London is preserved, coming from Kenya, the heaviest pair of tusks ever known: each measuring 3.5 meters in length, with a maximum diameter of 47 cm; their weight is 97 and 102 kilograms.
The name of this variety of quartz is derived from the phrase "by chance", in the sense of "if", because in the first half of the seventeenth century was discovered in Murano (Venice), the way to get a glass brownish-red with bright inclusions (" venturina "), chromatic effects very similar to those of this type of quartz.
As early as 1602 it was known that a variety of barite, clays present in the Bolognese, if it was heated with certain reducing substances (egg white and tragacanth) became brabantia bins phosphorescent after exposure to the sun. This variety was called stone phosphorus of Bologna. The phenomenon is due to the formation of barium sulfide during the heating process for the reduction of barium sulphate which constitutes the barite.
Beryl largest that has ever been found comes from Madagascar is 18 meters long, has a diameter of 3 feet and weighs almost 4 tons. A specimen 10 meters long, with a diameter brabantia bins of almost 2, was discovered in 1950 in the State of Maine.
Most large crystals of calcite are from Helgustadir and Reydarfioerdur, Iceland. These are three examples, the first of which measures 7 x 7 x 2 meters and weighs 254 kilograms; the second 6x6x3 meters and 280 kilograms; the third 5 x 5 x 3 and 214 kilograms.
The name of this plant resin is of Aztec origin (copalli) and means "incense": in fact, the copal was being used for its aromatic properties. In ancient Egypt was also used to create jewelry and jewelry. The Chinese impie