Gem Cutters News Award Winning Bulletin of the Gem Cutters Guild of Baltimore, Inc. Baltimore, Maryland Volume 63, Number 8 September, 2014

Source URL: www.gemcuttersguild.com

• Crystallography
• Lapis lazuli
• Turquoise
• Azurite
• Sodalite
• Ultramarine
• Oxalic acid
• Sapphire
• Lazurite
• Chemistry
• Matter
• Gemstones