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Walter R. Kellogg


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Mineral Specimen #5525    Calcite, Marcasite

Irving Materials Pendelton Qurry, Anderson, Madison Co., Indiana

7.8 x 4.2 x 2.9 cm
3.1 x 1.7 x 1.1 in



Clear to white colored Calcite crystals of three habits including one nice twinned crystal which approaching a butterfly twin for which the quarry is noted. The Calcite crystals are well formed with a bit of melted appearance and have a high luster. Also present is Marcasite with a high metallic luster and in remarkably good condition considering the specimen had been stored in a garage for 50 years in damp southern Michigan.

Condition: Good

Flaws: There is a contact line approximately 4 cm long (see third photo). There is cleaved chip on the corner of one of the larger crystals (see third photo). The twinned crystal has a chipped area near the base on one side and also has a ffew internal cleaves.

This mineral is also found in the following galleries: Minerals From the United States | Calcite | Sulfides and Sulfosalts | Minerals Priced Between 25 and 49 Dollars