ROC25.  LAKE SUPERIOR AGATE, A variegated Chalcedony, found in the Mississippi Valley and upper Great Lakes region,
chrome, pub:R Perkins"K", 39905, MWOB, unused (ms) ex 2.00
ROC26.  CHATHAM EMERALD 1014 carats from Smithsonium Inst., grown in 3 years. Identical properties to natural stone, made by Carroll
Chatham, San Francisco, Harvard Museum has 1275 carat crystal. Third largest emerald being grown for International Gem & Mineral Exposition, 16th Annual Convention California Federation of Mineralogical Societies Civic Auditorium, San Francisco, July
8,9,10, 1955, chrome, pub:James J Gillick, no#, unused (sf) ex 2.50
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