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THE DIAMOND . The ADAMAS of both ancients and moderns . HARDNESS from 20 to 18 ; SPECIFIC GRAVITY from 4,4 to 3,21 Varieties . WHITE , PINK , BLUISH , YELLOW , CUBIC , GREEN , BLACK . [ N.B. Cut green diamond must be very rare , as it ...
THE DIAMOND . The ADAMAS of both ancients and moderns . HARDNESS from 20 to 18 ; SPECIFIC GRAVITY from 4,4 to 3,21 Varieties . WHITE , PINK , BLUISH , YELLOW , CUBIC , GREEN , BLACK . [ N.B. Cut green diamond must be very rare , as it ...
Trang 101
The DIAMOND . Texture lamellar or foliated , like all the rest of the finer transparent gems ; that is to say , composed of thin hard plates , strongly adhering together . Electric on friction , and phosphoric in the dark .
The DIAMOND . Texture lamellar or foliated , like all the rest of the finer transparent gems ; that is to say , composed of thin hard plates , strongly adhering together . Electric on friction , and phosphoric in the dark .
Trang 103
1 2 10 0◅ 22 hey 0 . h dies . found likewise in the Brasils , and in the East InWe are told of several varieties of this stone , viz . the white , known so long to naturalists and jewellers under the name of the soft diamond .
1 2 10 0◅ 22 hey 0 . h dies . found likewise in the Brasils , and in the East InWe are told of several varieties of this stone , viz . the white , known so long to naturalists and jewellers under the name of the soft diamond .
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SHORT characteristical notices | 1 |
Memoirs of count la Lippe | 11 |
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