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Bureau of Mines / Minerals yearbook: Metals and minerals 1978-79
Year 1978-79, Volume 1 (1978-1979)

Baskin, G. David
Gem stones,   pp. 363-375 ff. PDF (1.3 MB)


Page 366

366 MINERALS YEARBOOK, 1978-79 
($37.7 million). Of this total, pearls, natural phires were imported from
34 (35) countries; and cultured, not set or strung, were valued the imports
from 10 countries amounted to at $3.9 million ($0.8 million). Natural pre-
98% (97%) of the value. 
cious and semiprecious stones unset were Natural pearls and parts from 12
(18) valued at $21.7 million ($33.9 million); and countries increased 54%
(192%) in value of synthetic or reconstructed stones unset imports 5 countries
accounted for 93% were valued at $1.9 million ($3.0 million). (79%) of the
value as follows: India, $291,000 Reexports of all other gem materials am-
($820,326); Burma, $215,000 ($238,694); Jaounted to $12.3 million ($18.4
million) in pan, $136,000 ($566,669); China, mainland, categories as follows:
Pearls, $1.2 million $89,000 ($196,720); and Hong Kong, $50,000 (less than
$0.1 million); natural precious ($110,357). Imports of cultured pearls inand
semiprecious stones, unset, $10.9 mu- creased 49% (46%) in value, and were
lion ($18 2 million) synthetic or recon received from 18 (23) countries Japan
at structed stones unset $0 2 million ($0 2 $24 6 ($36 2) million accounted
for 90% million). (91%) of the value. Imports of imitation 
 In 1978 imports by the United States of pearls decreased 2% (increased 43%)
in gem materials increased 36% in value over value Japan at $582 000 ($1
223 763) those of 1977; diamond accounted for 88% of accounted for 63% (93%)
of the value. Coral, the total value of gem material imports In cut but unset
and cameos suitable for use 1979 imports of gem materials decreased in jewelry
decreased 3% (18%) in value of 
2% in value from those of the previous year; imports, which were received
from .17 (16) diamond accounted for 86% of the total countries; 3 countries
accounted for 95% value of gem material imports. (91%) of the value as follows:
Taiwan, $2.2 
 Although rough and uncut diamond im million (1 5 million) Italy $14 million
($1 4 ports were reported from 31 (27) countries million) and Japan $0 5
million ($03 mil 99% (99%) of the value was from 9 coun- lion). 
tries. Cut but unset diamond, not over 0.5 Imports of other precious and
semiprecarat, was imported from 41 (40) countries; cious stones, rough and
uncut, increased however, the imports of this category from 52% (21%) in
value and came from 51 (48) 10 countries amounted to 99% (98%) of total countries,
of which 9 countries accounted carats and value. Cut but unset diamond, for
82% (83%) of the value. Other precious over 0.5 carat, was imported from
28 (33) and semiprecious stones, cut but unset, countries; the imports from
. 8 countries increased 34% (decreased 7%) in value and amounted to 99% (99%)
of the total carats were imported from 55 (54) countries, of and 98% (99%)
of the value, which 5 countries accounted for 86% (83%) 
 Emerald imports increased 5% (39%) in of the value. Synthetic gem stones,
cut but quantity and 28% (28%) in value. Emerald unset, increased 48% (46%)
in value and was imported from 42 (40) countries; the came from 20 (28) countries,
of which 7 imports from 12 countries amounted to 97% accounted for 93% (88%)
of the value. (97%) of the carats and 93% (95%) of the Imitation gem stones
increased 25% (2%) in value. Rubies were imported from 34 (31) value and
came from 20 (22) countries, of countries; the imports from 9 countries which
5 countries accounted for 93% (94%) amounted to 98% (98%) of the value. Sap-
of the value. 


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