A-Z COLORED STONES

AGATE
• Cryptocrystalline aggregate of quartz • Translucent to opaque • Banded, multicolored
• Lots of named types
– Ex. Botswana Agate
– Ex. Mexican Lace Agate

• Good jewelry stone



AMBER/AMETRINE
• AMBER
– Organic, fossilized resin from Baltic or Dominican Republic
– Soft, sensitive to chemicals

– Many enhancements and Imitations

• AMETRINE
– Bi-colored variety of quartz from Bolivia
– Can be cut to separate or blend colors

– Synthetics are made



AMETHYST
• Purple, single crystal quartz• Many shades such as:
– Siberian
– Rose d’ France
• Good jewelry stone • Brazil, Uruguay & Zambia major sources
• Fashioned in many ways • Birthstone for February


AMMOLITE/ANDALUSITE
• AMMOLITE:
– Fossilized ammonite shell, Canada is major source
– Iridescent

– Stabilized for durability