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Photograph; Cryptocrystalline.   Common name; Montana Agate Cut; Baroque cabochon.  Mohs; 7.  Specific Gravity; 2.6    Form and habit; Six sided crystals, granular masses.  Lapidarist; Sam Silverhawk   Reference; Dynamic Earth, An Introduction to Physical Geology, Fifth Edition.  Brian J. Skinner, Stephen C. Porter, Jeffery Park. Reference; The New Zealand Rockhound, Natalie Fernandez, 1981. Chapter 2., p.g. 31, 81. Copywrite © Silverhawk

Photograph; Cryptocrystalline. Common name; Montana Agate Cut; Baroque cabochon. Mohs; 7. Specific Gravity; 2.6 Form and habit; Six sided crystals, granular masses. Lapidarist; Sam Silverhawk Reference; Dynamic Earth, An Introduction to Physical Geology, Fifth Edition. Brian J. Skinner, Stephen C. Porter, Jeffery Park. Reference; The New Zealand Rockhound, Natalie Fernandez, 1981. Chapter 2., p.g. 31, 81. Copywrite © Silverhawk

Montana agate, cut from agate found long ago on a gravel bar of the Yellowstone River.

Montana agate, cut from agate found long ago on a gravel bar of the Yellowstone River.

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