# 63.2: 3D mineral samples, set 1

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Here are 10 samples of minerals that you will use to answer lab questions. Examine each sample in detail by rotating it and exploring its shape and physical characteristics. Properties of each mineral are listed in the table below the 3D model.

## Mineral A

Luster Hardness Color of streak Cleavage? Fracture? Other properties
nonmetallic 1 white Absent No Very soft. Feels soapy to the touch.

## Mineral B

Luster Hardness Color of streak Cleavage? Fracture? Other properties
nonmetallic 2.5 – 3 gray-brown to white 1 (excellent) No can be split into thin, flexible sheets

## Mineral C

Luster Hardness Color of streak Cleavage? Fracture? Other properties
nonmetallic 3 white Excellent; 3 directions, NOT at 90$$^{\circ}$$ to each other No fizzes when HCl is applied

## Mineral D

Luster Hardness Color of streak Cleavage? Fracture? Other properties
nonmetallic 5.5-6 white to pale gray Moderate. 2 planes, at about 90$$^{\circ}$$ to each other No color dark green to brown or black; forms short, 8-sided prisms

## Mineral E

Luster Hardness Color of streak Cleavage? Fracture? Other properties
nonmetallic 2 – 2.5 white 1 (perfect) No can be split into thin, flexible sheets

## Mineral F

Luster Hardness Color of streak Cleavage? Fracture? Other properties
nonmetallic 6.5 white 2, at 90$$^{\circ}$$ No lamellae

## Mineral G

Luster Hardness Color of streak Cleavage? Fracture? Other properties
nonmetallic 7 None (too hard to streak) Absent Conchoidal No reaction to HCl. Comes in many colors.

## Mineral H

Luster Hardness Color of streak Cleavage? Fracture? Other properties
nonmetallic 7 (too hard to streak) No Brittle; may show parting Dodecahedral crystals are distinctive.

## Mineral I

Luster Hardness Color of streak Cleavage? Fracture? Other properties
nonmetallic 2.5 white Excellent: 3 planes at 90$$^{\circ}$$ to each other (so it breaks into cubes) No Tastes salty.

## Mineral J

Luster Hardness Color of streak Cleavage? Fracture? Other properties
nonmetallic 5.5-6 white to pale gray Good. 2 planes, at about 60$$^{\circ}$$/120$$^{\circ}$$ to each other No color dark gray to black; forms prisms.