Malachite | Buy Malachite

Malachite

Malachite is a mineral from the carbonate group,it's chemical formula is Cu₂CO₃(OH)₂.It is found in oxidation zones of copper deposits.It is found worldwide and is used as jewelery mainly and smelting into copper.


1.Hardness:3.5-4 on the Moh scale.

2.Color:Green to dark green

3.Specific gravity:3.6-4

4.Cleavage:{201} Perfect,{010} Fair.

5.Habit:Stalctitic,massive,botryoidal.The habit of the crystals are prismatic,acicular and tabular.

6.Fracture:Subconchoidal to uneven.

7.Luster:Vitreous - Silky.

8.Streak:Light green

Some other properties that malachite shows are:

A.Diaphaneity:Translucent to opaque.
B.Crystal system:Monoclinic-prismatic.
C.Twinning:Penetration twinning and Polysynthetic twinning.

Garnet | Buy Garnet

Garnet

Garnet is a mineral from the Nesosilicates group (Silicate group),it's chemical formula is X₃Y₂(SiO₄)₃ where x stands for Mg,Fe²+,Mn and Ca.Y stands for Cr,Fe

Some examples of garnet are:
1.Grossular:Ca₃Al₂Si₃O₁₂
2.Pyrope:Mg₃Al₂Si₃O₁₂
3.Uvarovite:Ca₃Cr₂Si₃O₁₂
4.Almandine:Fe₂+³Al₂Si₃O₁₂
5.Andradite:Ca₃Fe₃+²Si₃O₁₂
6.Spessartine:Mn₃Al₂Si₃O₁₂

Garnet has the following properties:

1.Hardness:6.5-7.5 on the Moh scale

2.Color:Yellow,orange,red,blue,green,pink,black,brown,purple and colorless.

3.Specific gravity:3.1-4.3

4.Cleavage:None.

5.Habit:Dodecahedral,Massive,Cubic.

6.Fracture:Conchoidal to uneven.

7.Luster:Vitreous (Glassy) to Resinous.

8.Streak:Colorless.

Some other properties that Garnet shows are:

A.Crystal system:Isometric.
B.Tenacity:Brittle.
C.Color changing:Some garnets change their colors depending on daylight.

Calcite | Buy Calcite

Calcite

Calcite (CaCO₃) is a mineral from the carbonate group.It is a very common mineral which is found worldwide,it occurs in Igneous,Sedimentary,Metamorphic Rocks.

Calcite has the following properties:

1.Hardness:3 On the Moh Scale.

2.Color:White or colorless but can have a wide range of colors
(Violet,yellow,blue,green,red,grey,brown,black,orange etc.) Due to impurities.

3.Specific gravity:2.71.

4.Cleavage:Perfect {1011} on all three directions,Rhom bohedral.

5.Habit:Many crystal habits some of which are (Massive,concretionary,granular,rhombohedral,crystalline,talactitic)

6.Fracture:Conchoidal.

7.Luster:Vitreous (Glassy) or Pearly.

8.Streak:White.

Some other properties that Calcite shows are:

A.Solubility:Dissolves and reacts with acid.
B.Diaphaneity:Transparent,Translucent,Opaque.
C.Double Refraction.
D.Tenacity:Brittle.
E.Optical properties:Uniaxial.
F.Crystal system:Trigonal.
G.Twinning:Twin Twinning