Halides: Boleitis
Diagnostic card.
Pb 9 Cu 8 Ag 3 Cl 21 (OH) 16 * H 2 O
Tsingonia tetragonal
Hardness 3-3,5
Specific weight 5.05
Cleavage is perfect
Crack irregular
Color blue
Color in powder light blue, greenish
Glitter glass or pearl
The mineral is almost exclusively represented by crystals of intense blue color. In form, these are cubes, but in fact they consist of three intergrown individual individuals; Sometimes the edges of such "cubes" can reach 2 cm.
Diagnostic signs.
By the typical blue color and the shape of the crystals, it can be distinguished from almost any other mineral. Exceptions are kumengit, pseudoboletis and percilite, which can be distinguished from it with difficulty. The last mineral, unlike the other two, together with the pain is almost never found; He finds himself in several mines in Chile together with rare secondary minerals of lead.
Origin.
It is observed in the oxidation zone of copper deposits.
Place of Birth.
The classical deposit (now depleted) of this mineral is Boleo near Santa Rosalia in Southern California (Mexico). The pain there is present in mudstones along with cerussite, anglesite and phosgenite. As a rarity, pain occurs in Mammoth Mine (Arizona), Australia (Broken Hill) and several Chilean deposits. Perhaps he is present in Greece in the ancient dumps near the town of Lavrion (Greece).
Pain (blue, the form is similar to pyrite). Mexico. (2011).
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Poisonous and radioactive dangerous stones and minerals
** - poisonous stones and minerals (mandatory check in the chemical laboratory + explicit indication of toxicity)
** - radioactive stones and minerals (mandatory check on the standard dosimeter + ban on open sales in case of radioactivity exceeding 24 milli / g / h + additional measures of population protection)
Catalog of minerals and semi-precious stones of the world by groups
** - poisonous stones and minerals
** - radioactive stones and minerals
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