Flint

Troctolite

Flint and Troctolite

Flint

Troctolite

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Definition

Flint is a hard type of sedimentary rock that produces a small piece of burning material when hit by steel

Troctolite is a mafic intrusive rock type. It consists essentially of major but variable amounts of olivine and calcic plagioclase along with minor pyroxene. It is an olivine-rich anorthosite, or a pyroxene-depleted relative of gabbro

History

Origin

Discoverer

Unknown

Christian Leopold von Buch

Etymology

From Old English flint - a type of rock mainly known for high hardness and for giving off sparks when struck

From German Troklotit, from Greek trōktēs, a marine fish (taken to be trout)

Class

Sedimentary Rocks

Igneous Rocks

Sub-Class

Durable Rock, Hard Rock

Family

Group

Plutonic

Other Categories

Fine Grained Rock, Opaque Rock

Coarse Grained Rock, Opaque Rock

Texture

Banded, Rough

Phaneritic

Color

Black, Brown, Green, Grey, Red, White

Dark Grey to Black

Maintenance

Less

Durability

Durable

Water Resistant

✔ ✘

Scratch Resistant

✔ ✘

Stain Resistant

✔ ✘

Wind Resistant

✔ ✘

Acid Resistant

✔ ✘

Appearance

Glassy or Pearly

Veined and Shiny

Uses

Architecture

Interior Uses

Decorative Aggregates, Homes, Interior Decoration

Bathrooms, Countertops, Decorative Aggregates, Entryways, Flooring, Homes, Interior Decoration, Kitchens

Exterior Uses

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

Other Architectural Uses

Curbing

Industry

Construction Industry

Arrowheads, Cutting Tool, Spear Points

As Dimension Stone, Building houses or walls, Cement Manufacture, Construction Aggregate, for Road Aggregate

Medical Industry

Antiquity Uses

Artifacts

Artifacts, Jewellery, Monuments, Sculpture

Other Uses

Commercial Uses

Creating Artwork, Gemstone, In fire-starting tools, Manufacture of tools, Metallurgical Flux, Jewelry, To ignite fire, Used in flintlock firearms

Cemetery Markers, Commemorative Tablets, Laboratory bench tops, Jewelry, Sea Defence, Tombstones

Types

Chert and Jasper

Ultramafic rock

Features

Clasts are smooth to touch, Easily splits into thin plates, Has High structural resistance against erosion and climate

Smooth to touch

Archaeological Significance

Monuments

Famous Monuments

Sculpture

Famous Sculptures

Pictographs

Petroglyphs

Figurines

Fossils

Present

Absent

Formation

Flint is formed by the decomposition and compaction of various organisms such as sponges and diatoms under the water.

Troctolite is a fine-grained, hard rock which is a type of metasomatite, essentially altered basalt. It forms with or without crystallization, either below the surface as intrusive rocks or on the surface as extrusive rocks.

Composition

Mineral Content

Silicon

Augite, Olivine, Plagioclase, Pyroxene

Compound Content

Silicon Dioxide

Aluminium Oxide, CaO, Chromium(III) Oxide, Iron(III) Oxide, Potassium Oxide, MgO, Sodium Oxide, Silicon Dioxide, Sulfur Trioxide

Transformation

Metamorphism

✔ ✘

Types of Metamorphism

Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism, Hydrothermal Metamorphism, Impact Metamorphism, Regional Metamorphism

Weathering

✔ ✘

Types of Weathering

Mechanical Weathering

Erosion

✔ ✘

Types of Erosion

Chemical Erosion, Coastal Erosion, Water Erosion

Properties

Physical Properties

Hardness

1 7

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Grain Size

Very fine-grained

Coarse Grained

Fracture

Conchoidal

Streak

White

Black

Porosity

Highly Porous

Luster

Vitreous

Compressive Strength

450.00 N/mm²225.00 N/mm²

0.15 450

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Cleavage

Toughness

1.5

1.6

Specific Gravity

2.5-2.82.86-2.87

0 8.4

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Transparency

Translucent to Opaque

Opaque

Density

2.7-2.71 g/cm³2.7-3.3 g/cm³

0 1400

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Thermal Properties

Specific Heat Capacity

0.74 kJ/Kg K0.84 kJ/Kg K

0.14 3.2

👆🏻

Resistance

Heat Resistant, Impact Resistant, Pressure Resistant, Wear Resistant

Impact Resistant, Pressure Resistant, Wear Resistant

Reserves

Deposits in Eastern Continents

Asia

Azerbaijan, China, Russia

India, Russia

Africa

South Africa

Europe

Austria, Belgium, Cyprus, Denmark, France, Germany, Italy, Malta, Netherlands, Poland, Portugal, Romania, Spain, Sweden, Switzerland, Turkey, Ukraine, United Kingdom

Germany, Greece, Italy, Scotland, Turkey

Others

Greenland

Deposits in Western Continents

North America

USA

Canada, USA

South America

Bolivia

Brazil, Colombia, Venezuela

Deposits in Oceania Continent

Australia

New Zealand, South Australia

New Zealand, Queensland

All about Flint and Troctolite Properties

Know all about Flint and Troctolite properties here. All properties of rocks are important as they define the type of rock and its application. Flint belongs to Sedimentary Rocks while Troctolite belongs to Igneous Rocks.Texture of Flint is Banded, Rough whereas that of Troctolite is Phaneritic. Flint appears Glassy or Pearly and Troctolite appears Veined and Shiny. The luster of Flint is vitreous while that of Troctolite is . Flint is available in black, brown, green, grey, red, white colors whereas Troctolite is available in dark grey to black colors. The commercial uses of Flint are creating artwork, gemstone, in fire-starting tools, manufacture of tools, metallurgical flux, jewelry, to ignite fire, used in flintlock firearms and that of Troctolite are cemetery markers, commemorative tablets, laboratory bench tops, jewelry, sea defence, tombstones.