jasper

…of rock you are drilling. You didn’t mention what type of material was used in the rock lamp that inspired you. However, I know agate and…

…of microscopic crystals. The most common example of aggregate minerals is the chalcedony family, which includes agate and jasper. These members…

…ice fishers. While his choices of material and subject seem odd matches (most wouldn’t think to use ruby, sapphire, quartz, jasper,…

…make it a particularly convincing jade simulant. Other stones, such as carnelian, zoisite, calcite, and jasper may simulate other colors…

…the quality factors for crystalline varieties of quartz. Cryptocrystalline varieties, such as chalcedony and jasper, aren’t included.…

…Tumbled agate and jasper inside a 15-pound rock tumbler barrel. Photo by 88pathoffroad. Licensed under CC By-SA 3.0. Gemstone Hardness All…

…cut curves with a wheel, while you’re restricted to straight lines with a saw. You must be careful when grinding delicate material. A…

…Strong Iolite Strong to Very Strong Ivory, Elephant Inert Jasper, Red Strong Jet Inert Lapis Lazuli Inert to Very Weak Malachite Moderate to…

…onyx, jasper, and opal, can cause silicosis and silicotuberculosis. Note: there is debate over whether non-crystalline silica will cause…