A Quartz cabochon from Brazil with Dolomite crystal inclusions.

The colourless transparent Quartz hosts several of the prismatic crystal inclusions, all of which are stained with a dark brownish-orange oxidisation.
Some of these display a rhombohedral crystal habit and twinning.

Images 4 to 6 are magnified views of the inclusions.

weight:  16.37 carats
shape:   Oval cabochon
dimensions:   21.55 x 11.78 x 8.93 mm
treatment:  None