Microcline Feldspar B pyrite crystal Blue onyx is a variety

Blue onyx is a variety of the chalcedony mineral composed of banding of blue

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Microcline Feldspar B pyrite crystal Blue onyx is a varietyMicrocline is a common triclinic potassium rich feldspar, often found in granite and pegmatites, and stable at lower temperatures than orthoclase. It is widely used for gemstones, ceramics, and glass. This particular specimen is from Quebec, Canada. Measuring approximately 2. 5 inches in length, 1 inch in height, and 1 inch in width. Weighing . 13 pounds. Customer will receive the exact price pictured.