Coquina

Hawaiite

Coquina and Hawaiite

Coquina

Hawaiite

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1 Definition

1.1 Definition

Coquina is a sedimentary rock that is composed either wholly or almost entirely of the transported, abraded, and mechanically-sorted fragments of the shells of molluscs, trilobites, brachiopods, or other invertebrates

Hawaiite is volcanic rock that resembles basalt. It is an olivine basalt with intermediate composition between alkali olivine and mugearite

1.2 History

1.2.1 Origin

European Foreland Basins

Hawaii Islands

1.2.2 Discoverer

Unknown

Joseph Iddings

1.3 Etymology

From Concha (Latin)+ Coquina(Spanish) +conch(English)= Couquina (mid 19th century)

From Hawaii Islands

1.4 Class

Sedimentary Rocks

Igneous Rocks

1.4.1 Sub-Class

Durable Rock, Soft Rock

Durable Rock, Medium Hardness Rock

1.5 Family

1.5.1 Group

Not Applicable

Volcanic

1.6 Other Categories

Coarse Grained Rock, Opaque Rock

Opaque Rock

2 Texture

2.1 Texture

Clastic

Glassy, Massive, Porphyritic, Scoriaceous, Vesicular

2.2 Color

Beige, Buff, Orange

Black, Brown, Light to Dark Grey

2.3 Maintenance

Less

2.4 Durability

Non-Durable

Durable

2.4.1 Water Resistant

✔ ✘

2.4.2 Scratch Resistant

✔ ✘

2.4.3 Stain Resistant

✔ ✘

2.4.4 Wind Resistant

✔ ✘

2.4.5 Acid Resistant

✔ ✘

2.5 Appearance

Layered, Banded, Veined and Shiny

Dull and Soft

3 Uses

3.1 Architecture

3.1.1 Interior Uses

Decorative Aggregates, Homes, Hotels, Interior Decoration

Decorative Aggregates, Floor Tiles, Flooring, Homes, Hotels, Interior Decoration, Kitchens

3.1.2 Exterior Uses

Garden Decoration, Office Buildings

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

3.1.3 Other Architectural Uses

Curbing

3.2 Industry

3.2.1 Construction Industry

Building houses or walls, Construction Aggregate

As Dimension Stone, Cobblestones, Rail Track Ballast, Roadstone

3.2.2 Medical Industry

Not Yet Used

3.3 Antiquity Uses

Artifacts, Monuments, Sculpture, Small Figurines

Artifacts

3.4 Other Uses

3.4.1 Commercial Uses

Creating Artwork

Creating Artwork, Sea Defence

4 Types

4.1 Types

Not Available

4.2 Features

Available in Lots of Colors and Patterns, Is one of the oldest rock

Has High structural resistance against erosion and climate, Very fine grained rock

4.3 Archaeological Significance

4.3.1 Monuments

Used

4.3.2 Famous Monuments

Data Not Available

Easter Island in the Polynesian Triangle, Pacific Ocean

4.3.3 Sculpture

Used

Not Yet Used

4.3.4 Famous Sculptures

Data Not Available

Not Applicable

4.3.5 Pictographs

Used

4.3.6 Petroglyphs

Used

4.3.7 Figurines

Used

Not Yet Used

4.4 Fossils

Present

Absent

5 Formation

5.1 Formation

Coquina is a sedimentary rock which is formed when billions of small clam-like seashell, called Coquina, or cockleshell are die and hence are deposited, buried and turns into a rock when pressure is applied.

Hawaiite is a fine-grained, hard rock that forms when bits of lava shoot out of volcanoes and reach the Earth's surface.

5.2 Composition

5.2.1 Mineral Content

Apatite, Augite, Bronzite, Calcite, Chert, Chlorite, Clay Minerals, Epidote, Feldspar, Garnet, Micas, Muscovite or Illite

Olivine, Plagioclase, Pyroxene

5.2.2 Compound Content

CaO, Carbon Dioxide, Iron(III) Oxide, MgO

Aluminium Oxide, CaO, Iron(III) Oxide, FeO, Potassium Oxide, MgO, MnO, Sodium Oxide, Phosphorus Pentoxide, Silicon Dioxide, Titanium Dioxide

5.3 Transformation

5.3.1 Metamorphism

✔ ✘

5.3.2 Types of Metamorphism

Not Applicable

Impact Metamorphism

5.3.3 Weathering

✔ ✘

5.3.4 Types of Weathering

Biological Weathering, Chemical Weathering, Mechanical Weathering

Biological Weathering

5.3.5 Erosion

✔ ✘

5.3.6 Types of Erosion

Coastal Erosion, Sea Erosion, Water Erosion, Wind Erosion

Not Applicable

6 Properties

6.1 Physical Properties

6.1.1 Hardness

1-26

1 7

6.1.2 Grain Size

Coarse Grained

Not Applicable

6.1.3 Fracture

Irregular

Conchoidal

6.1.4 Streak

White

Not Available

6.1.5 Porosity

Highly Porous

Less Porous

6.1.6 Luster

Dull to Vitreous to Submetallic

Not Available

6.1.7 Compressive Strength

NA37.40 N/mm²

0.15 450

6.1.8 Cleavage

Not Available

Not Applicable

6.1.9 Toughness

Not Available

6.1.10 Specific Gravity

1.10-2.24Not Available

0 8.4

6.1.11 Transparency

Opaque

6.1.12 Density

2.8-2.9 g/cm³Not Available

0 1400

6.2 Thermal Properties

6.2.1 Specific Heat Capacity

NANA

0.14 3.2

6.2.2 Resistance

Heat Resistant, Impact Resistant, Pressure Resistant, Wear Resistant

Heat Resistant, Pressure Resistant, Wear Resistant

7 Reserves

7.1 Deposits in Eastern Continents

7.1.1 Asia

Not Yet Found

India, Russia

7.1.2 Africa

Not Yet Found

South Africa

7.1.3 Europe

United Kingdom

Iceland

7.1.4 Others

Not Yet Found

Hawaii Islands

7.2 Deposits in Western Continents

7.2.1 North America

USA

Canada, USA

7.2.2 South America

Not Yet Found

Brazil

7.3 Deposits in Oceania Continent

7.3.1 Australia

Not Yet Found

All about Coquina and Hawaiite Properties

Know all about Coquina and Hawaiite properties here. All properties of rocks are important as they define the type of rock and its application. Coquina belongs to Sedimentary Rocks while Hawaiite belongs to Igneous Rocks.Texture of Coquina is Clastic whereas that of Hawaiite is Glassy, Massive, Porphyritic, Scoriaceous, Vesicular. Coquina appears Layered, Banded, Veined and Shiny and Hawaiite appears Dull and Soft. The luster of Coquina is dull to vitreous to submetallic while that of Hawaiite is not available. Coquina is available in beige, buff, orange colors whereas Hawaiite is available in black, brown, light to dark grey colors. The commercial uses of Coquina are creating artwork and that of Hawaiite are creating artwork, sea defence.