|3 TUMBLED NATURAL 1.3"-1.7"
COPPER METAL NUGGETS FROM
MICHIGAN USA - 96.4 GRAMS
|Size: 5.1" x 2.92" x .55"
129mm x 74mm x 14mm
Weight: 11.15 oz 317 grams
5.1" Native Copper Nugget from Michigan.
A fantastic copper nugget formation rich in
golden copper color. A natural formation
lightly tumbled to remove outer matrix and
round the rough edges of the copper. Piece
weighs over 2/3 lb. Michigan's Keweenaw
Peninsula is the most important locality in
the world for pure native copper. Mining
began in 1845 and continued until 1968 and
over 5 million tons of refined copper was
recovered from the mines. In the early
1900s it led the world in copper production
and "Lake Copper" was the purity standard
to which other refined copper was
compared. Long before the mining
operations began in the past century,
pre-historic people mined copper from the
mineral rich veins. A great copper nugget
specimen for display and study.
|Chalcanthite is soluble in water.
Do not wash it.
XXXL TOP Quality
Electric Blue Crystals on Matrix