Agate are named after the river Achates in Greece, where it was discovered and names by Theophrastus in ancient times, in about the 3rd to 4th centuries BC. There are many varieties of agate that can be found throughout the world, some of which exhibit beautiful colors, banding, quartz lined cavities, eye agate, scenic agate, dendrite agate, and moss agate. Agate slices come from Agate geodes which are formed in volcanic lava which contain gas bubbles that  fill with water and turn to quartz. Agate is quartz with impurities mostly translucent. The color of agates can vary significantly, depending on the distribution of minerals within each band. Minerals that contribute to the stone color include: Iron Oxides (red, brown, black, green) Manganese (pink, violet, black), Chromium (green, yellow, red), Titanium (blue), Cobalt (red), Nickel (green) and Copper (red, blue, green). The shade of color is further modified when the above minerals work in combination. The color  can occur through an agate band, or it can form as small, dot-like inclusions, Color can be influence via temperature, radiation, pressure and weathering.  On the Mohs' hardness scale Agates have a hardness of 7, Marble is 2.5 - 5, Granite 7 - 8   and Diamond is 10, the hardest of nature's materials.   Metaphysical Properties:  Agate is a stone of balance, precision, perception and eliminates negativity.  Size is by longest points, Agates form in many shapes. We can not pick only certain shapes. Some are round and some are oval. We can not promise shapes to be round, ect. Thickness varies from 1/8th to 1/4th of an inch.  We do promise every agate to be LaserGrade quality.
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Laser Setting for a 35 watt CO2 Laser Power - 30% Speed - 50% For Photo Engraving use 250 - 300 dpi/ppi  w/2" focal length lens Do not go slower than 25% Speed, Agate may Crack

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