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Description

Stalactitic chalcedony geode "The Pie Chart"Locale: Atlas Mountains, Morocco Approx dimensions: 4 x 4 x 3" Approx weight: 588g These unusual geodes from Morocco are like small caves lined with stalactites, botryoidal forms, and swirling agate patternsthough this one completely lacks the stalactitic growth forms common to this region. While commonly called red chalcedony, I find the color is more orange to red orange. Hematite causes this coloration, but later phases of growth (second

256g F 5

There are a lot of broken stalactites

UV reactivity Visible calcite fluoresces and phosphoresces faint red under 365 nm UV light

and coppery browns

with tones of brown

I have also seen examples where it appeared iron staining had leaked through the breaks

The exterior displays ropy ramen-like growth patterns indicative of volcanic origins

These slabs have been polished to reveal their pattern

the points have a matte luster with a sheen effect

South Africa

Inclusions make the point near-opaque in the top third but translucent below this

I call this one "the pie chart": one quarter matrix