154. Pyrite 155. Agate
Perf 14 3/4:13 3/4 (40.64/24.13), Offset
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2000. MINERALS OF ARMENIA (II issue)
Quartz is widely available in nature. Its crystals have the form of an extended prism. The colour is diverse: colourless, white and gray.
190. Quartz 191. Molybdenite
Perf 14 3/4:13 3/4 (40.64/24.13), Offset
First Day Cover: |
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