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Konigsberg.
The amber bed is also exposed on the coast and is worked on the shore
by the sea. In Burma it is known as Burmite and is harder than
succinite. The chief area is the Hukong valley. It is pale yellow in
colour, but red and black varieties are also common. Burmite is valued
in Burma, India and China, but still there is some import of the Baltic
amber.
Imitations
of coral and bakelite are also common. Specific gravity is one test.
Bakelite has 1.25 to 1.28. It will sink in the salt water solution
mentioned already, whereas amber will float.
Jet
It
is a hard and compact variety of lignite, often used for cheap
jewellery and beads. Hardness = 2 to 2-5, and specific gravity = 1.1 to
1.4. Black bakelite can be made
to imitate the same.
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165
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