Iris: goddess of agates

Article Abstract:

The rare iris agate contains an extremely fine banding that allows it to diffract light and produce a spectrum of colors similar to a rainbow. The gemstone, difficult to identify because its banding is colorless, requires cutting perpendicular to the bands to allow it to separate white light into its components.

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Cutting & displaying iris agate

Article Abstract:

The iris agate is a rare species of the agate with an extremely fine banding that allows it to diffract light and produce a rainbow effect. However, this effect could only be displayed by cutting the mineral at right angles to the banding. Cutting techniques are presented.

Methods, Gem cutting

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Unveiling the secrets of lace agate

Article Abstract:

Lace agates, which have intricately curved, lacy-looking patterns, are found primarily in Namibia and Mexico. Information is presented on the formation of crazy lace and blue lace agate and on dyeing agates.

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