Jasperoid

Rhyolite

Jasperoid and Rhyolite

Jasperoid

Rhyolite

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Definition

Jasperoid is a rare, peculiar type of metasomatic alteration of rocks

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

History

Origin

USA

North America

Discoverer

Unknown

Ferdinand von Richthofen

Etymology

From silica, the main mineral content of Jasperoid

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

Class

Sedimentary Rocks

Igneous Rocks

Sub-Class

Durable Rock, Medium Hardness Rock

Durable Rock, Hard Rock

Family

Group

Volcanic

Other Categories

Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock

Coarse Grained Rock, Opaque Rock

Texture

Earthy

Aphanitic, Glassy, Porphyritic

Color

Black, Brown, Green, Grey, Pink, White

Grey, White, Light Black

Maintenance

Less

Durability

Durable

Water Resistant

✔ ✘

Scratch Resistant

✔ ✘

Stain Resistant

✔ ✘

Wind Resistant

✔ ✘

Acid Resistant

✔ ✘

Appearance

Glassy or Pearly

Banded

Uses

Architecture

Interior Uses

Decorative Aggregates, Floor Tiles, Homes, Interior Decoration

Decorative Aggregates, Homes, Hotels, Interior Decoration, Kitchens

Exterior Uses

As Building Stone, Garden Decoration, Office Buildings, Paving Stone

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

Other Architectural Uses

Curbing

Industry

Construction Industry

As a Flux in the Production of Steel and Pig Iron, As a Sintering Agent in Steel Industry to process Iron Ore, As Dimension Stone, Cement Manufacture, for Road Aggregate, Making natural cement, Manufacture of Magnesium and Dolomite Refractories, Production of Glass and Ceramics, Serves as an Oil and Gas Reservoir rock

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

Medical Industry

Taken as a Supplement for Calcium or Magnesium

Antiquity Uses

Artifacts, Jewellery, Monuments, Sculpture

Artifacts

Other Uses

Commercial Uses

An Oil and Gas Reservoir, As a Feed Additive for Livestock, Gemstone, Metallurgical Flux, Production of Lime, Soil Conditioner, Source of Magnesia (MgO)

Gemstone, Laboratory bench tops, Jewelry

Types

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

Features

Host Rock for Lead, Traps for subsurface fluids like Oil and Natural Gas., Zinc and Copper Deposits

Acidic in nature, Available in lots of colors

Archaeological Significance

Monuments

Famous Monuments

Sculpture

Famous Sculptures

Pictographs

Petroglyphs

Figurines

Fossils

Present

Absent

Formation

Jasperoid is a rare and peculiar type of metasomatic alteration of rocks. It is formed by extreme alteration of wall rocks within a shear zone which may occur in sediments, andesites, trachytes and basalts.

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

Composition

Mineral Content

Clay Minerals, Pyrite, Quartz, Sulfides

Biotite, Feldspar, Hornblade, Plagioclase, Pyroxene, Quartz

Compound Content

NaCl, CaO, Carbon Dioxide, Magnesium Carbonate, MgO

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

Transformation

Metamorphism

✔ ✘

Types of Metamorphism

Burial Metamorphism, Cataclastic Metamorphism, Regional Metamorphism

Weathering

✔ ✘

Types of Weathering

Biological Weathering, Chemical Weathering, Mechanical Weathering

Erosion

✔ ✘

Types of Erosion

Chemical Erosion, Sea Erosion, Water Erosion, Wind Erosion

Properties

Physical Properties

Hardness

3.5-46-7

1 7

👆🏻

Grain Size

Medium to Fine Coarse Grained

Large and Coarse Grained

Fracture

Conchoidal

Sub-conchoidal

Streak

White

Porosity

Less Porous

Highly Porous

Luster

Vitreous and Pearly

Earthy

Compressive Strength

140.00 N/mm²140.00 N/mm²

0.15 450

👆🏻

Cleavage

Perfect

Toughness

Specific Gravity

2.8-32.65-2.67

0 8.4

👆🏻

Transparency

Transparent to Translucent

Opaque

Density

2.8-2.9 g/cm³2.4-2.6 g/cm³

0 1400

👆🏻

Thermal Properties

Specific Heat Capacity

0.92 kJ/Kg K0.71 kJ/Kg K

0.14 3.2

👆🏻

Resistance

Heat Resistant, Pressure Resistant, Wear Resistant

Heat Resistant, Wear Resistant

Reserves

Deposits in Eastern Continents

Asia

China, India

Africa

Morocco, Namibia

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

Europe

Austria, Italy, Romania, Spain, Switzerland

Germany, Iceland, Ireland, Italy, Spain

Others

Deposits in Western Continents

North America

Mexico, USA

Canada, USA

South America

Brazil, Colombia

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

Deposits in Oceania Continent

Australia

New South Wales, Queensland, Yorke Peninsula

New Zealand, Queensland, Western Australia

All about Jasperoid and Rhyolite Properties

Know all about Jasperoid and Rhyolite properties here. All properties of rocks are important as they define the type of rock and its application. Jasperoid belongs to Sedimentary Rocks while Rhyolite belongs to Igneous Rocks.Texture of Jasperoid is Earthy whereas that of Rhyolite is Aphanitic, Glassy, Porphyritic. Jasperoid appears Glassy or Pearly and Rhyolite appears Banded. The luster of Jasperoid is vitreous and pearly while that of Rhyolite is earthy. Jasperoid is available in black, brown, green, grey, pink, white colors whereas Rhyolite is available in grey, white, light black colors. The commercial uses of Jasperoid are an oil and gas reservoir, as a feed additive for livestock, gemstone, metallurgical flux, production of lime, soil conditioner, source of magnesia (mgo) and that of Rhyolite are gemstone, laboratory bench tops, jewelry.