Rhyolite

Dunite

Rhyolite and Dunite

Rhyolite

Dunite

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1 Definition

1.2 Definition

Rhyolite is a fine-grained igneous rock which is rich in silica

Dunite is a green to brownish coarse-grained igneous rock mainly consisting of olivine

1.3 History

1.4.1 Origin

North America

New Zealand

1.4.4 Discoverer

Ferdinand von Richthofen

Ferdinand von Hochstetter

1.6 Etymology

From German Rhyolit, from Greek rhuax lava stream + lithos stone

From the name of Dun Mountain, New Zealand, + -ite1

1.7 Class

Igneous Rocks

1.8.1 Sub-Class

Durable Rock, Hard Rock

Durable Rock, Medium Hardness Rock

1.10 Family

1.10.2 Group

Volcanic

Plutonic

1.11 Other Categories

Coarse Grained Rock, Opaque Rock

2 Texture

3.1 Texture

Aphanitic, Glassy, Porphyritic

Phaneritic

3.3 Color

Grey, White, Light Black

Dark Greenish - Grey

3.5 Maintenance

Less

3.7 Durability

Durable

3.8.1 Water Resistant

✔ ✘

3.8.3 Scratch Resistant

✔ ✘

3.8.5 Stain Resistant

✔ ✘

3.8.7 Wind Resistant

✔ ✘

3.8.9 Acid Resistant

✔ ✘

3.9 Appearance

Banded

Rough and Shiny

4 Uses

4.1 Architecture

4.1.1 Interior Uses

Decorative Aggregates, Homes, Hotels, Interior Decoration, Kitchens

Decorative Aggregates, Interior Decoration

5.1.2 Exterior Uses

As Building Stone, As Facing Stone, Paving Stone, Office Buildings

As Building Stone, As Facing Stone, Garden Decoration, Paving Stone

5.1.4 Other Architectural Uses

Not Yet Used

Curbing

5.2 Industry

5.2.1 Construction Industry

Arrowheads, As Dimension Stone, Building houses or walls, Construction Aggregate, Cutting Tool, for Road Aggregate, Knives

As Dimension Stone, Cement Manufacture, Construction Aggregate, for Road Aggregate, Making natural cement, Raw material for the manufacture of mortar

5.3.2 Medical Industry

Not Yet Used

5.4 Antiquity Uses

Artifacts

Artifacts, Monuments, Sculpture, Small Figurines

5.6 Other Uses

5.7.2 Commercial Uses

Gemstone, Laboratory bench tops, Jewelry

Creating Artwork, Gemstone, Jewelry, Source of Chromite, Platinum, Nickel and Garnet, Source of Diamonds

7 Types

7.2 Types

Pumice Rocks, Obsidian Rocks, Perlite Rocks, Porphyritic Rocks.

Not Available

7.4 Features

Acidic in nature, Available in lots of colors

Constitutes upper part of the Earth's mantle, Generally rough to touch, Host rock for Diamond, Is one of the oldest rock

7.6 Archaeological Significance

7.6.2 Monuments

Not Yet Used

Used

7.6.4 Famous Monuments

Not Applicable

Data Not Available

7.6.6 Sculpture

Not Yet Used

Used

7.6.8 Famous Sculptures

Not Applicable

Data Not Available

7.6.10 Pictographs

Not Used

Used

7.6.12 Petroglyphs

Not Used

Used

7.6.14 Figurines

Not Yet Used

Used

7.8 Fossils

Absent

9 Formation

9.1 Formation

Rhyolite is a felsic extrusive rock and due to its high silica content, rhyolite lava is very viscous and is volcanic equivalent of granite.

Dunite is a plutonic ultramafic igneous rock consisting almost m olivine. It can be formed in two ways.

9.3 Composition

9.3.1 Mineral Content

Biotite, Feldspar, Hornblade, Plagioclase, Pyroxene, Quartz

Amphibole, Chromite, Garnet, Magnesium, Olivine, Phlogopite, Plagioclase, Pyroxene

9.3.3 Compound Content

Ca, Fe, Potassium Oxide, Mg, Potassium, Silicon Dioxide, Sodium

Ca, CaO, Fe, Potassium, Silicon Dioxide, Sodium, Titanium Dioxide

9.5 Transformation

9.5.1 Metamorphism

✔ ✘

9.5.3 Types of Metamorphism

Burial Metamorphism, Cataclastic Metamorphism, Regional Metamorphism

Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism

9.5.5 Weathering

✔ ✘

9.5.7 Types of Weathering

Biological Weathering, Chemical Weathering, Mechanical Weathering

9.5.9 Erosion

✔ ✘

9.5.11 Types of Erosion

Chemical Erosion, Sea Erosion, Water Erosion, Wind Erosion

Coastal Erosion, Glacier Erosion, Water Erosion

11 Properties

11.1 Physical Properties

11.1.1 Hardness

6-73.5-4

1 7

11.1.2 Grain Size

Large and Coarse Grained

Coarse Grained

11.1.3 Fracture

Sub-conchoidal

Irregular

11.1.4 Streak

Colorless

White

11.1.5 Porosity

Highly Porous

Less Porous

11.1.6 Luster

Earthy

Shiny

11.1.7 Compressive Strength

140.00 N/mm²107.55 N/mm²

0.15 450

11.1.14 Cleavage

Not Available

Imperfect

11.1.15 Toughness

2.1

11.1.16 Specific Gravity

2.65-2.673-3.01

0 8.4

11.1.18 Transparency

Opaque

Translucent to Opaque

11.1.20 Density

2.4-2.6 g/cm³2.84-2.85 g/cm³

0 1400

11.2 Thermal Properties

11.2.1 Specific Heat Capacity

NA1.25 kJ/Kg K

0.14 3.2

11.3.2 Resistance

Heat Resistant, Wear Resistant

Heat Resistant, Pressure Resistant, Wear Resistant

12 Reserves

12.1 Deposits in Eastern Continents

12.1.1 Asia

China, India

China, India, Indonesia, Kazakhstan, Russia, South Korea, Thailand, Turkey

12.1.2 Africa

Angola, Egypt, Madagascar, Namibia, Nigeria, South Africa

Morocco, South Africa

12.1.3 Europe

Germany, Iceland, Ireland, Italy, Spain

Finland, France, Georgia, Germany, Great Britain, Italy, Kazakhstan, Netherlands, Norway, Spain, Switzerland, Venezuela

12.1.4 Others

Not Yet Found

12.2 Deposits in Western Continents

12.2.1 North America

Canada, USA

12.2.2 South America

Argentina, Bolivia, Chile, Colombia, Ecuador, Peru, Venezuela

Argentina, Brazil, Colombia, Ecuador, Venezuela

12.3 Deposits in Oceania Continent

12.3.1 Australia

New Zealand, Queensland, Western Australia

New Zealand, Western Australia

All about Rhyolite and Dunite Properties

Know all about Rhyolite and Dunite properties here. All properties of rocks are important as they define the type of rock and its application. Rhyolite and Dunite belong to Igneous Rocks.Texture of Rhyolite is Aphanitic, Glassy, Porphyritic whereas that of Dunite is Phaneritic. Rhyolite appears Banded and Dunite appears Rough and Shiny. The luster of Rhyolite is earthy while that of Dunite is shiny. Rhyolite is available in grey, white, light black colors whereas Dunite is available in dark greenish - grey colors. The commercial uses of Rhyolite are gemstone, laboratory bench tops, jewelry and that of Dunite are creating artwork, gemstone, jewelry, source of chromite, platinum, nickel and garnet, source of diamonds.