Minerals A to H

A

Agate – A form of quartz with characteristic bands.

Amber – Fossilized tree resin.

Amazonite – Turquoise-coloured, also known as the Amazon Stone.

Amethyst – A form of quartz violet in colour.

Ammolite – Gemstones formed on the shells of ammonite.

Ammonite shell with ammolite.

Aquamarine – Gem-quality and translucent, light-blue beryl mineral.

Aragonite – Calcium-carbonate crystals that flower from a single point.

Aventurine – A form of quartz, usually green in colour.

B

Bismuth – A chemical element (Bi).

Black Tourmaline – Silicate crystal rich in iron.

Blue Topaz – Rare, gem-quality topaz.

C

Calcite – Calcium carbonate, principal ingredient in cement or limestone.

Celestine – Also known as Celestite.

Caledonite – Sulfate-carbonate mineral.

Carnelian – A form of chalcedony, found as an infill between other minerals.

Chalcedony – Grayish blue, white, or pale brown silica dioxide.

Citrine – A form of quartz golden-orange in colour.

Clear Quartz – Clear silicon dioxide, the second-most common mineral in the earth.

D

Desert Rose – Brittle crystals of gypsum and barite minerals.

Desert rose specimen.

Diamond, Herkimer – See Herkimer Diamond.

Dolomite – Curved crystals of calcium magnesium carbonate.

E

Elestial – A form of quartz also known as Skeletal, Jacare or Crocodile Quartz.

Emerald – A precious gemstone green in colour.

F

Fluorite – Calcium fluoride mineral, also known as fluorspar.

Fossilized Orthoceras – A squid-looking invertebrate that lived 400 million years ago.

Fossilized Sea Urchin – Sea urchins that lived 65.5 million years ago.

G

Garnet – Gem-quality and translucent, commonly red in colour.

Gold – A precious metal and chemical element (Au).

H

Hematite – An iron oxide mineral.

Herkimer Diamond – Double-terminated quartz crystal.

Heliotrope – A form of chalcedony also known as Bloodstone.