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SCOTT NO
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1802 A461
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DATE OF ISSUE
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1982 Aug 25
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FACE VALUE
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20f
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COUNTRY
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People's Republic Of China
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DESCRIPTION
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The stamp shows Wolframite. It is brownish black in color. It is greasy,uneven & brittle. It is easily soluble in hydrochloric acid. It turns blue in concentrated sulphuric acid. The crystals are vertically striped.
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GEMSTONE
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Wolframite
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VARIATION
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Block, First Day Cover, PC, Envelope
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