Search

Search U.S. government technical reports digitized or harvested by TRAIL.

Keyword Search

Enter your search term(s):
[advanced search]

10 results returned

Search results

• Tourmaline
• Feldspar gems :(Amazon stone, Moonstone, Sunstone, etc.)
• Rubies and sapphires
• Mining laws of Cuba
• Turquoise
• Topaz
• Mining laws of the Dominican Republic
• Opals
• Garnets (gem stones)
• Emeralds