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This Specimen has been sold.
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11" Colorful Polished Marcasite Agate Section - Indonesia
This is an interesting, 11" wide polished section of Indonesian marcasite agate from Western Java, Indonesia. It is polished to a glossy-finish on one side and features beautiful formations of lustrous marcasite that are encapsulated in colorful agate. The general shape of the specimen resembles that of a fish.
The specimen stands up nicely on one edge without the need for a display stand.
The specimen stands up nicely on one edge without the need for a display stand.
About Agate
Agate is a variety of microcrystalline quartz (chalcedony) that displays translucence and, in some cases, banding. Agate primarily forms when silica-rich fluids fill pockets within rocks and/or fossils, depositing the silica along the walls of the rock. This process can result in banding patterns, as the compositions and impurities of these depositing fluids change over time. These banding patterns can either form as flat layers, creating linear patterns known as waterline agate, or as rounded layers, forming more common ring-like patterns. These patterns depend on the surfaces available for deposition.
Agate is a variety of microcrystalline quartz (chalcedony) that displays translucence and, in some cases, banding. Agate primarily forms when silica-rich fluids fill pockets within rocks and/or fossils, depositing the silica along the walls of the rock. This process can result in banding patterns, as the compositions and impurities of these depositing fluids change over time. These banding patterns can either form as flat layers, creating linear patterns known as waterline agate, or as rounded layers, forming more common ring-like patterns. These patterns depend on the surfaces available for deposition.
About Marcasite
Marcasite is an iron sulfide mineral with the chemical formula FeS2. It is similar to pyrite in both its chemical composition and appearance, but it forms an entirely different crystal structure and is much more reactive to humidity. It is often found within sedimentary rock and hydrothermal deposits, and at one point was used for its sulfur content.
Marcasite is an iron sulfide mineral with the chemical formula FeS2. It is similar to pyrite in both its chemical composition and appearance, but it forms an entirely different crystal structure and is much more reactive to humidity. It is often found within sedimentary rock and hydrothermal deposits, and at one point was used for its sulfur content.
SPECIES
Chalcedony var. Agate & Marcasite
LOCATION
Sumatra, Indonesia
SIZE
11 x 7.55", up to 2.45" thick
CATEGORY
SUB CATEGORY
ITEM
#308129
