A collection of 20 rocks and minerals in a lockable wooden box

MACHINE TRANSLATION (not authorised yet)

The collection contains 20 natural specimens - rocks and minerals, each size about 3-3.5 cm. All specimens are placed in a wooden box with compartments and marked with indexes from 1 to 20.

OKAZY:
1 - Quartz
2 - Magnetite
3 - Muscovite
4 - Calcite
5 - Dolomite
6 - Fluorite
7 - Montmorillonite (in. montmorillonite)
8 - Psylomelan (in. psylomelan)
9 - Kaolinite
10 - Anhydrite
11 - Sandstone
12 - Slate (I) clay /sedimentary rock/
13 - Limestone
14 - Conglomerate (in. conglomerate)
15 - Basalt
16 - Granite
17 - Gabro
18 - Slate (II) / transformed rock, medium-grained/
19 - Slate (III) /p transformed slate from item 12, fine-grained/
20 - Serpentinite