Quartz crystal, Europe, 1999

Ethnography and Folk Medicine

1999

Cluster of quartz crystals

Time Measurement

Quartz crystal, water-worn

Time Measurement

Quartz crystal, slice

Time Measurement

Quartz crystal, with possible GT-cut plate position indicated

Time Measurement

Quartz crystal, containing 'ghost'

Time Measurement

Quartz crystal, with X, Y and Z axes labelled

Time Measurement

'Twinned' quartz crystal

Time Measurement