Rocks and Minerals, Letter O. The Ultimate Guide

text that reads, crystals, rocks, minerals, gemstones

Obsidian - A Natural Volcanic Glass

a larger and smaller piece of black obsidian, inside a square picture frame

Ocean Jasper - Colourful Type of Rhyolite

zoomed-in shot of a colourful ocean jasper stone. Displayed inside a square photo frame.

Onyx - Black and White Banded Agate

the mineral onyx in a square picture frame

Opal - Type of Silica with a High Water Content

opal with distinctive play of colour. Photo is inside a square, wooden photo frame

Minerals: M and N

Minerals: P

icons for worldwide shipping, free U.K delivery over £80, plain recyclable packaging, fast dispatch, and excellent customer service

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Shop by Mineral
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- Minerals A
  Minerals A
  - Agate
    Agate
  - Amazonite
    Amazonite
  - Amethyst
    Amethyst
  - Angelite
    Angelite
  - Apatite
    Apatite
  - Aquamarine
    Aquamarine
  - Aventurine
    Aventurine
- Minerals B
  Minerals B
  - Bloodstone
    Bloodstone
- Minerals C
  Minerals C
  - Calcite
    Calcite
  - Carnelian
    Carnelian
  - Chalcedony
    Chalcedony
  - Charoite
    Charoite
  - Chrysocolla
    Chrysocolla
  - Chrysoprase
    Chrysoprase
  - Citrine
    Citrine
  - Copper
    Copper
- Minerals D
  Minerals D
  - Dinosaur Bone
    Dinosaur Bone
  - Dumortierite
    Dumortierite
- Minerals E and F
  Minerals E and F
  - Emerald
    Emerald
  - Eudialyte
    Eudialyte
  - Fluorite
    Fluorite
  - Fossilised Coral
    Fossilised Coral
- Minerals G
  Minerals G
  - Garnet
    Garnet
  - Goldstone
    Goldstone
  - Green Quartz
    Green Quartz
- Minerals H and I
  Minerals H and I
  - Hematite
    Hematite
  - Iolite
    Iolite
- Minerals J
  Minerals J
  - Jade
    Jade
  - Jasper
    Jasper
- Minerals K and L
  Minerals K and L
  - Kyanite
    Kyanite
  - Labradorite
    Labradorite
  - Lapis Lazuli
    Lapis Lazuli
  - Larimar
    Larimar
  - Lemon Quartz
    Lemon Quartz
- Minerals M
  Minerals M
  - Malachite
    Malachite
  - Mica
    Mica
  - Moonstone
    Moonstone
  - Morganite
    Morganite
  - Mother of Pearl
    Mother of Pearl
- Minerals N and O
  Minerals N and O
  - Obsidian
    Obsidian
  - Onyx
    Onyx
  - Common Opal
    Common Opal
  - Opalite (glass)
    Opalite (glass)
- Minerals P
  Minerals P
  - Peridot
    Peridot
  - Petrified Wood
    Petrified Wood
  - Phosphosiderite
    Phosphosiderite
  - Pietersite
    Pietersite
  - Prehnite
    Prehnite
  - Pyrite
    Pyrite
- Minerals Q and R
  Minerals Q and R
  - Colourless Quartz
    Colourless Quartz
  - Quartz (other varieties)
    Quartz (other varieties)
  - Rainbow Calsilica (man-made)
    Rainbow Calsilica (man-made)
  - Rhodochrosite
    Rhodochrosite
  - Rhodonite
    Rhodonite
  - Rose Quartz
    Rose Quartz
  - Ruby
    Ruby
  - Ruby Zoisite
    Ruby Zoisite
- Minerals S
  Minerals S
  - Sapphire
    Sapphire
  - Septarian
    Septarian
  - Seraphinite
    Seraphinite
  - Shungite
    Shungite
  - Smoky Quartz
    Smoky Quartz
  - Sodalite
    Sodalite
  - Sugilite
    Sugilite
  - Sunstone
    Sunstone
- Minerals T
  Minerals T
  - Tanzanite
    Tanzanite
  - Tiffany Stone
    Tiffany Stone
  - Tiger Iron
    Tiger Iron
  - Tigers Eye
    Tigers Eye
  - Topaz
    Topaz
  - Tourmaline
    Tourmaline
  - Turquoise
    Turquoise
- Minerals U to Z
  Minerals U to Z
  - Unakite
    Unakite
Articles & Photos
Articles & Photos
- Browse All Articles
  Browse All Articles
- Minerals A
  Minerals A
  - Agate
    Agate
  - Amazonite
    Amazonite
  - Amethyst
    Amethyst
  - Angelite
    Angelite
  - Apatite
    Apatite
  - Aquamarine
    Aquamarine
  - Aragonite
    Aragonite
  - Aventurine
    Aventurine
  - Azurite
    Azurite
- Minerals B
  Minerals B
  - Beryl
    Beryl
  - Bloodstone
    Bloodstone
  - Bumblebee Jasper
    Bumblebee Jasper
- Minerals C
  Minerals C
  - Calcite
    Calcite
  - Carnelian
    Carnelian
  - Chalcedony
    Chalcedony
  - Charoite
    Charoite
  - Chrysocolla
    Chrysocolla
  - Chrysoprase
    Chrysoprase
  - Citrine
    Citrine
  - Copper
    Copper
  - Corundum
    Corundum
- Minerals D
  Minerals D
  - Dinosaur Bone
    Dinosaur Bone
  - Dumortierite
    Dumortierite
- Minerals E - F
  Minerals E - F
  - Emerald
    Emerald
  - Eudialyte
    Eudialyte
  - Feldspar
    Feldspar
  - Fluorite
    Fluorite
  - Fossilised Coral
    Fossilised Coral
  - Fuchsite
    Fuchsite
- Minerals G
  Minerals G
  - Garnet
    Garnet
  - Goethite
    Goethite
  - Goldstone
    Goldstone
  - Granite
    Granite
- Minerals H
  Minerals H
  - Hematite
    Hematite
  - Hemimorphite
    Hemimorphite
  - Hornblende
    Hornblende
- Minerals I - J
  Minerals I - J
  - Iolite
    Iolite
  - Jade
    Jade
  - Jasper
    Jasper
- Minerals K - L
  Minerals K - L
  - Kambaba Jasper
    Kambaba Jasper
  - Kyanite
    Kyanite
  - Labradorite
    Labradorite
  - Lapis Lazuli
    Lapis Lazuli
  - Larimar
    Larimar
- Minerals M - N
  Minerals M - N
  - Malachite
    Malachite
  - Meteorite
    Meteorite
  - Mica
    Mica
  - Moldavite
    Moldavite
  - Mookaite
    Mookaite
  - Moonstone
    Moonstone
  - Morganite
    Morganite
  - Mother of Pearl
    Mother of Pearl
- Minerals O
  Minerals O
  - Obsidian
    Obsidian
  - Ocean Jasper
    Ocean Jasper
  - Onyx
    Onyx
  - Opal
    Opal
- Minerals P
  Minerals P
  - Peridot
    Peridot
  - Petrified Wood
    Petrified Wood
  - Phosphosiderite
    Phosphosiderite
  - Pietersite
    Pietersite
  - Pyrite
    Pyrite
- Minerals Q
  Minerals Q
  - Quartz
    Quartz
  - Quartz with Inclusions
    Quartz with Inclusions
- Minerals R
  Minerals R
  - Rainbow Calsilica
    Rainbow Calsilica
  - Rhodochrosite
    Rhodochrosite
  - Rhodonite
    Rhodonite
  - Rose Quartz
    Rose Quartz
  - Ruby
    Ruby
  - Ruby Zoisite
    Ruby Zoisite
- Minerals S
  Minerals S
  - Sapphire
    Sapphire
  - Septarian Nodule
    Septarian Nodule
  - Seraphinite
    Seraphinite
  - Shungite
    Shungite
  - Smoky Quartz
    Smoky Quartz
  - Sodalite
    Sodalite
  - Spinel
    Spinel
  - Sugilite
    Sugilite
  - Sunstone
    Sunstone
- Minerals T
  Minerals T
  - Tanzanite
    Tanzanite
  - Tiffany Stone
    Tiffany Stone
  - Tiger Iron
    Tiger Iron
  - Tigers Eye
    Tigers Eye
  - Topaz
    Topaz
  - Tourmaline
    Tourmaline
  - Turquoise
    Turquoise
- Minerals U - Z
  Minerals U - Z
  - Unakite
    Unakite
Blog
Blog