Deluxe Hardness Pick Set is unique in that, unlike other mineral
hardness testing tools that use minerals or crystal points, these picks
are made of metals and alloys of hardness values equal to 2 through 9 on
Mohsí hardness scale. And because the picks are made of metal, they
are easily ground to sharp points which will not break off and which can
be easily sharpened.
Why measure the hardness of a mineral?
Because hardness is an important and quantifiable physical characteristic
of a mineral and in your effort to identify an unknown mineral, the hardness,
if known, combined with other properties, can narrow your search to just
a handful of possibilities.
How do you use the hardness picks?
Simply scratch a smooth surface of your unknown mineral with the picks
of various indicated hardness. As an example, if a No. 5 pick scratches
the mineral, but a No. 4 pick does not, then your mineralís hardness is
4.5. Then compare this against a table of minerals listing hardness values
to aid in identifying the unknown mineral.
Included in the Deluxe Hardness Pick Set
Four double-ended picks with eight points comprising 2, 3, 4, 5, 6, 7,
8, and 9 on Mohsí hardness scale, as shown above.
A slab of glass (hardness of about 5.5) which, when scratched, quickly
distinguishes hard from soft minerals.
A 100 grit polishing stone to keep the points sharp.
A streak plate for testing a mineralís streak color.
A magnet to test magnetic rocks such as magnetite and pyrrhotite.
An attractive, mahogany-finished and compact wooden case.
All points are stamped with the indicated hardness value, and each
double-ended pick body is color coded for quickly finding the desired pick.
Compact. The wooden storage case is only 7" tall by 2" wide.