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Aciniform Quartz:

- Dimensional activity in relief/intaglio habit.
- Basic terrace structure with overlap.
- Parallel/spherical wave form habit revealing forces that shape the quartz.

Note:

- Botryoidal habit seen along edge of cratered field.
- White/amber (imbedded) capture stones.
- Five-step intaglio/relief folding transition from spew point to sphere.

Enlarge picture for better detail.

radiolaria
Silica skeletons of radiolaria in false color