You’ll receive samples of 15 minerals and rocks from which key elements are extracted for fuel and industrial applications. Size: 4 5/8″L x 3 1/2″W x 1″H.Contents: calcite, soft coal, feldspar, fluorite, gamet, granite, graphite, gypsum, limestone, mica, quartz, sandstone, shale, siltstone, and sulfur.
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