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Agate (/ ˈ æ ɡ ɪ t / AG-it) is a variety of chalcedony, [1] which comes in a wide variety of colors. Agates are primarily formed within volcanic and metamorphic rocks.The ornamental use of agate was common in ancient Greece, in assorted jewelry and in the seal stones of Greek warriors, [2] while bead necklaces with pierced and polished agate date back to the 3rd millennium BCE in the Indus ...
Sometimes natural bands agate beads without and artificial etchings are also viewed as a type of dzi by Tibetans. The number of "eyes", or circular designs on the stone, is considered significant when considering the importance of a dzi. The symbolic meaning of dzi beads are sometimes based on the number and arrangement of the dots. [citation ...
Agate “Agate is earthy, warm and rich,” Salzer says, noting that it exists in many colors. “Look for antique Victorian banded Enlish and Scottish agates in deep orange, browns, cinnamon, and ...
Whether a gemstone is a natural stone or synthetic, the chemical, physical, and optical characteristics are the same: They are composed of the same mineral and are colored by the same trace materials, have the same hardness and density and strength, and show the same color spectrum, refractive index, and birefringence (if any). Lab-created ...
Fire agate shows iridescent phenomena on a brown background; iris agate shows exceptional iridescence when light (especially pinpointed light) is shone through the stone. Landscape agate is chalcedony with a number of different mineral impurities making the stone resemble landscapes.
Examples of stone magatama from the Kofun period are especially numerous. An excavation of the Kamegaoka Kofun, Kishiwada, Osaka, revealed a local who had been buried with a jade, jasper, and alabaster magatama necklace, as well as magatama placed near the feet. A bronze mirror imported from China accompanying the burial was dated to 239 CE.