The minerals of the Sòl-de-Riu Highy School lab.We have another ppt with the minerals in Mohs Hardness Scale

1. The minerals of the
laboratory of Sòl-de-riu high
school
Maria Novella, Carolina Teleutsa, Laura Reverter, Nerea Sancho i Juanjo Savan

2. •Chemical composition: SiO2
•Mohs hardness scale: 6,5-7
•Habit: Amorphous
•Luster: Pearly
•Color: pattterned withbands, plumes, dendrites
or inclusions bluish gray, gray, greenish gray,
•whitish gray and reddish.
•Row: White
•Clearness: Translucent
•Other information: Agate is not a specific mineral,
but a set of microcrystalline varieties of quartz.
AGATHE

3. •Chemical composition: Fe3O4
•Mohs hardness scale: 5,5-6
•Habit: For the manufacture of refractory
metals
•Luster: Metallic
•Color: Black iron
•Row: Black
•Clearness: Opaque
•Other information: It’s crystallization is in
cubic
•It’s attracted by magnet
•Sometimes works as a natural magnetic
MAGNETITE

4. OPAL
•Chemical
composicio
n:

5. Chemical
composition:
KAl2(AlSi3O
MUSCOVITE (white mica)

6. HALITHE (Rock salt)
•Chemical composition: NaCl.
•Mohs hardness scale: 2.05-2.5.
•Habit: Predominantly cubes and in massive
sedimentary beds, but also granular,
fibrous and compact.
•Color: Colorless or white; also blue, purple,
red, pink, yellow, orange, or gray.
•Row: White.
•Clearness: Transluced.
•Other information: Salty flavor,
fluorescent.

7. SILVITE (silvina)
•Chemical composition: KCl.
•Mohs hardness scale: 2.
•Habit: As cubes and octahedral;
columnar, in crusts, coarse
granular, massive.
•Luster: Vitreous to oily.
•Color: Colorless to white, pale
gray, pale blue ; may be yellowish

8. GALENA
•Chemical Composition: PbS
•Mohs hardness scale: 2.5-2.75
•Habit: Cubes and octahedra
•Luster: Metallic on cleavage planes
•Color: Lead gray and silvery
•Row: White
•Clearnes: Transparent or translucent
•Other information: It is the natural mineral form
of lead sulfide.
•This is the most important kind of lead, one of
the most abundant sulfur minerals, there are a
lot of varieties.

9. BIOTITE (or Black mica)
•Chemical composition: K(Mg,Fe)3AlSi3O10(OH)2
•Mohs hardness scale: 2.5–3.0
•Habit: Massive to platy
•Luster: Vitreous to pearly
•Color: Dark brown, greenish-brown, blackish-brown,
yellow, white
•Row: Grey
•Clearness: Transparent to translucent to opaque
•Other information: Biotite is used extensively to
constrain ages of rocks, by either potassium-argon
dating or argon-argon dating.
•It’s one of the minerals of granit

10. MALACHITE
•Chemical composicion: Cu2CO3(OH)2
•Mohs hardness scale: 3.5–4.0
•Habit: Massive, botryoidal, stalactitic, crystals are
acicular to tabular prismatic
•Luster: Ductile; vitreous in large cantidad
•Color: Green
•Row: Light green
•Clearness: Opaque or translucent
•Other information: Malachite was used as a mineral
pigment in green paints from antiquity until about
1800.

11. PYRITE
•Chemical composicion: FeS2
•Mohs hardness scale: 6-6,5
•Habit: Cubic, faces may be striated, but also
frequently octahedral and pyritohedron
•Luster: Metallic, glistening
•Color: Pale brass-yellow
•Row: black-greenish-brown to black
•Clearness: No
•Other information: Pyrite remains in commercial
use for the production of sulfur dioxide, for use
in such applications as the paper industry, and in
the manufacture of sulfuric acid.