Write a review on Mexican opals was perhaps the last thing I expected to be doing, in order to have

HOME CONTACT ORDERS moda 2011 AND CALLER OF CHEST OF ANGELS WISH RUBY AND DIAMOND ENGAGEMENT RINGS ENGAGEMENT FOR LONE MALE HANGING RINGS DOWNLOAD HERE YOUR CATALOGUE "ETERNITY" ALLIANCES
Write a review on Mexican opals was perhaps the last thing I expected to be doing, in order to have fallen in love with this beautiful and diverse gemstones, and given the dearth of information available about this amazing gem in the Internet. I thought I would share some of the knowledge I have to help other users understand this incredible gemstone. This guide will be of particular interest that you are familiar moda 2011 with Australian Opal. About Opals Most people are more familiar with Australian opals that the Mexican variety. Opals Composed by silica veins which are found in the matrix of the host rock. In the case of Australian Opal opal veins found in the iron ore and often can be polished with gold to produce Koroit opal. In the quarries of Mexican opal, opal stones are found in the matrix of pale rhyolite. moda 2011 That is softer than the opal itself. The play of colors seen in all types of opal depends on the arrangement of microscopic spheres of silica opal. If the arrangement of the spheres is no coincidence that the play of color, moda 2011 known as opal potch opal. A regular arrangement of spheres is required to produce a play of color. The size of the spheres determines the color, smaller spheres with red color, and the larger the purple spheres occurs. The play of colors in Mexican opals is often strongly dependent on the light intensity around what is considered the stone, the more valuable stones have good game in low light. There opal mines across Mexico, many are near the town of Magdalena. One of the largest opal mining is the San Martin mine produced almost all types of Mexican opal, many more new mines are appearing all the time and there is much uncharted territory in Mexico. moda 2011 The terminology is confusing because these terms are not applicable to the Mexican Opal and Australian opal. Mexican Fire Opal is often some confusion this term. Mexican fire opals are prized for being crystalline, and the most sought after stones are a deep orange or red. These stones have no play of color (in contrast to the Australian fire opal, the term is used here to describe the play of color opal which is the predominant red color). These flash Opal stones are crystal opals as water. The base color may vary these stones and many of the stones are clear, orange or brown. The color intensity of the game determines the value and size of the stone. These stones are found near the surface of an opal mine and are usually rhyolite matrix. A variation of this form of opal that resembles the Australian Opal and is very attractive in the Nayarita mine in northern Mexico. Cantera opal These stones are comparable to those of Australia and its origins are similar. These are found in small pockets or seams / opal veins associated with rhyolite matrix, the host rock. The word refers to the quarry host matrix. Initially they were not as appreciated as pure cuts but currently get very good prices. The Mexican Opal often requires a dark to highlight the play of colors and in some cases Altho quarry background, provides a natural support for the opal, call it a double-natural effect if you will. Comment: The most spectacular have a pool or "eye" in the center of the matrix opal. They are breaking the quarry laboriously by hand, and looking for veins of opal. Backlit opal This refers to a property of Mexican and Australian opals where when illuminated from behind, stones develop a set of brilliant colors. This effect is rare and will require several broken tons of array to get some of these stones. Mexican Opal black are extremely rare and are seen as a very small percentage of Mexican opals. They are extremely valuable. Like Jelly opal with Australian Opal, this refers to a cloudy translucent stone, with or without play of color. The Carbonera opal opal Carbonera mine is similar to that of Honduras, moda 2011 and has little flashes Andamooka opal in a matrix of dark basalt type. Of the Opals pink opal mines Rositas thesis are pink and do not show play of colors. I so