石英上的方解石，覆有赭铁矿涂层。 標本 - 高度: 12 cm - 闊度: 8 cm- 333 g

Calcite on Quartz with Limonite coating from Krushev dol Mine, Madan Municipality, Smolyan Province, Bulgaria.

An attractive mineral specimen from the Krushev Dol Mine, Madan Municipality, Smolyan Province, Bulgaria, featuring well-developed calcite crystals on quartz with a natural limonite coating. The specimen displays a beautiful contrast between the light-colored calcite crystals, crystalline quartz, and the warm earthy tones of the iron oxide coating.

The limonite coating adds depth and character to the specimen, highlighting the contours of the quartz and calcite while preserving the natural geological history of the piece. This association reflects the complex hydrothermal processes that formed the famous ore veins of the Madan mining district, known worldwide for its exceptional sulphide and carbonate mineral specimens.

The Krushev Dol Mine is part of the renowned Madan ore field, a classic Balkan mineral locality celebrated by collectors for producing outstanding specimens of galena, sphalerite, quartz, calcite, and related minerals.

A distinctive cabinet specimen combining attractive crystal forms, natural coloration, and provenance from one of Bulgaria’s most important mineral-producing regions.