Four Treasures Reference Database
Record No. 2451
Chalcedony
Journal Article
Halford-Watkins, J.F. (1941) Chalcedony. The Gemmologist, Vol. 10, No. 118, May, pp. 88–91.
Sinkankas/Born No.: NIS/NIB | RWHL
gemology, quartz, chalcendoy, agate, gems