In the Von Kossa technique for calcium, what color do deposits appear?

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Multiple Choice

In the Von Kossa technique for calcium, what color do deposits appear?

Explanation:
Von Kossa staining highlights mineralized calcium by forming metallic silver at sites of phosphate or carbonate in calcium salts. The silver deposits are reduced to metallic silver when exposed to light, which appears black under the microscope. So the mineralized deposits show up as black against the counterstain.

Von Kossa staining highlights mineralized calcium by forming metallic silver at sites of phosphate or carbonate in calcium salts. The silver deposits are reduced to metallic silver when exposed to light, which appears black under the microscope. So the mineralized deposits show up as black against the counterstain.

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