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Used in the Stone Age for spear points & arrowheads, this form of quartz later found a use in firearms |
flint
|
$1,200 |
DJ |
GEOLOGY |
2022-11-09 |
#8738 |
|
Chert & this related rock that fractures into pointy pieces provided tools & weapons 2 million years ago |
flint
|
$400 |
J |
ROCKS & MINERALS |
2018-06-22 |
#7790 |
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This form of silica, also the name of a Michigan city, is Ohio's gemstone |
flint
DD
|
$4,000 |
DJ |
STATE GEMS |
2011-07-29 |
#6205 |
|
This mineral used by early man to make tools is actually a type of chert |
flint
|
$400 |
DJ |
ROCKS & MINERALS |
1993-09-15 |
#2073 |
|
Early man produced sparks to start fires by striking this mineral against iron |
flint
|
$200 |
DJ |
ROCKS & MINERALS |
1992-10-23 |
#1870 |
|
Striking this hard form of quartz with steel produces a spark |
flint
|
$200 |
DJ |
GEOLOGY |
1985-05-21 |
#182 |
|
A sparking rock or a Michigan city |
Flint
|
$200 |
DJ |
ROCKS & MINERALS |
1985-03-25 |
#141 |