Moss agate
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Moss agate is a semi-precious gemstone formed from silicon dioxide. It is a form of chalcedony which includes minerals of a green color embedded in the stone, forming filaments and other patterns sugg
Moss agate pebble, 1 inch (25 mm) long
Montana moss agate
Gothic-Style Bracelet; gold, carnelian, malachite, moss agate, amethysts, aquamarines, rubies. The Walters Art Museum.
Agate
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Agate is a banded variety of fibrous chalcedony. Agate stones are characterized by alternating bands of different colored chalcedony and often contain some visible quartz crystals. They are common in
Moss agate
…suggestive of moss. The field is a clear or milky-white quartz, and the included minerals are mainly oxides of manganese or iron. It is not a true form of agate, because it does not have concentric banding. Moss agate can be clear or milky white, with green dendritic inclusions that resemble moss. The colors…
Polished agate nodule from Malawi
When backlit, thin slices of agate can occasionally show their fibrous structure as lines running perpendicular to the bands (top)
Agate exhibiting wall banding (top) and level banding (bottom)
Agate geode slice with macrocrystalline quartz and a hollow center