|
|
|
SCOTT NO
|
1802 A461
|
|
DATE OF ISSUE
|
1982 Aug 25
|
|
FACE VALUE
|
20f
|
|
COUNTRY
|
People's Republic Of China
|
|
|
|
|
DESCRIPTION
|
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.
|
|
|
|
|
|
|
|
|
|
|
GEMSTONE
|
Wolframite
|
|
VARIATION
|
Block, First Day Cover, PC, Envelope
|
|
|