Namibia Picture Jasper mine
Picture Jasper is mined on a farm situated in the Southern part
of Namibia, known for its rugged terrain and pristine beauty of the
grassy plains and mountainous area.
A few meters below the sandy surface lie the hard rock within which
the incredible banded patterns of the Picture Jasper is found.
Where the rock is mined, a large area is first carefully excavated,
removing the top soil or overburden to expose the rock bed. Holes
are then drilled into the rock and with the use of specialized, non-detonating
chemical compound, which reacts very quickly when ignited to produce
high volumes of harmless gas. The gas enters into the fractures created
from the percussive drilling and into the natural fractures and planes
of weakness of the rock to produce a shearing of the rock often called
splitting.
Large blocks are removed form the area and further
split or chiseled to determine the grading of the “picture” of
pattern within.
Skilled and experienced workmen carefully examine
and chisel away at each block to expose or chop out the varying sizes
and grades
of Picture stone. A time consuming process, with pieces varying between
1kg – 120kg in size and of different grading.
Once examined the individual pieces are grouped according to grade
and size, ready to be weighed.
International Trade - Exports
Higher grade picture stone is extremely sought after and popular
in the manufacture of jewellery and various curios crafts in
the international market. Large quantities of rough stone are
currently
exported to manufactures world-wide.
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