Blue Granite and Dacite

Blue Granite

Dacite

Definition

Blue Granite is an igneous rock and a variety of Larvikite, notable for the presence of thumbnail-sized blue crystals of feldspar

Dacite is a volcanic igneous rock which is rintermediate in composition between andesite and rhyolite

History

Origin

Unknown

Romania and Moldova, Europe

Discoverer

Unknown

Etymology

From the color of rock, Blue

From Dacia, a province of the Roman Empire which lay between the Danube River and Carpathian Mountains where the rock was first described

Class

Igneous Rocks

Sub-Class

Durable Rock, Medium Hardness Rock

Durable Rock, Soft Rock

Family

Group

Volcanic

Other Categories

Fine Grained Rock, Opaque Rock

Fine Grained Rock, Medium Grained Rock, Opaque Rock

Texture

Phaneritic

Aphanitic to Porphyritic

Color

Black, Brown, Light to Dark Grey, White

Bluish - Grey, Brown, Grey, Light to Dark Grey

Maintenance

Less

Durability

Durable

Water Resistant

Yes

Scratch Resistant

Yes

Stain Resistant

Yes

Wind Resistant

Yes

Acid Resistant

Appearance

Shiny

Vesicular

Uses

Architecture

Interior Uses

Decorative Aggregates, Floor Tiles, Flooring, Interior Decoration

Decorative Aggregates, Entryways, Interior Decoration

Exterior Uses

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

As Building Stone, Paving Stone, Garden Decoration

Other Architectural Uses

Curbing

Industry

Construction Industry

As Dimension Stone, Cement Manufacture, Construction Aggregate, for Road Aggregate

As Dimension Stone, Construction Aggregate, for Road Aggregate, Landscaping

Medical Industry

Not Yet Used

Antiquity Uses

Artifacts, Monuments, Sculpture, Small Figurines

Artifacts

Other Uses

Commercial Uses

Cemetery Markers, Commemorative Tablets, Creating Artwork, Curling

Commemorative Tablets, Creating Artwork

Types

Not Available

Footwall Dacite, Hanging wall Dacite, Tuff and Biotite Dacite

Features

Available in lots of colors, Is one of the oldest rock

Host Rock for Lead, Is one of the oldest rock

Archaeological Significance

Monuments

Used

Not Yet Used

Famous Monuments

Data Not Available

Not Applicable

Sculpture

Used

Not Yet Used

Famous Sculptures

Data Not Available

Not Applicable

Pictographs

Not Used

Used

Petroglyphs

Not Used

Used

Figurines

Used

Not Yet Used

Fossils

Absent

Formation

Blue Granite is an igneous rock which is a variety of Larvikite and is known mainly for the presence of thumbnail-sized crystals of feldspar.

Dacitic magma is formed by the subduction of young oceanic crust under a thick felsic continental plate. Further, the Oceanic crust is hydrothermally altered as quartz and sodium are added.

Composition

Mineral Content

Albite, Amphibole, Apatite, Biotite, Feldspar, Hornblade, Ilmenite, Magnetite, Muscovite or Illite, Olivine, Plagioclase, Pyroxene, Quartz, Sulfides, Titanite, Zircon

Amphibole, Apatite, Biotite, Feldspar, Garnet, Hornblade, Magnetite, Plagioclase, Pyroxene, Quartz, Zircon

Compound Content

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

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

Transformation

Metamorphism

Yes

Types of Metamorphism

Burial Metamorphism, Cataclastic Metamorphism

Weathering

Yes

Types of Weathering

Biological Weathering, Chemical Weathering

Biological Weathering, Chemical Weathering, Mechanical Weathering

Erosion

Yes

Types of Erosion

Chemical Erosion, Coastal Erosion, Water Erosion

Chemical Erosion

Properties

Physical Properties

Hardness

6-7

2-2.25

Grain Size

Medium to Fine Coarse Grained

Fracture

Not Available

Conchoidal

Streak

White

Porosity

Less Porous

Luster

Subvitreous to Dull

Compressive Strength

175.00 N/mm²

Not Available

Cleavage

Not Available

Perfect

Toughness

Not Available

Specific Gravity

2.8-3

2.86-2.87

Transparency

Opaque

Translucent

Density

2.9-2.91 g/cm³

2.77-2.771 g/cm³

Thermal Properties

Specific Heat Capacity

0.79 kJ/Kg K

0.92 kJ/Kg K

Resistance

Heat Resistant, Impact Resistant, Pressure Resistant

Heat Resistant, Impact Resistant, Pressure Resistant, Wear Resistant

Reserves

Deposits in Eastern Continents

Asia

Not Yet Found

Africa

Not Yet Found

Europe

Bulgaria, England, Germany, Norway, Romania, Switzerland

France, Greece, Romania, Scotland, Spain

Others

Not Yet Found

Deposits in Western Continents

North America

USA

South America

Argentina, Bolivia, Brazil, Chile, Colombia, Ecuador, Peru

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

Deposits in Oceania Continent

Australia

New South Wales, New Zealand, Queensland, South Australia, Western Australia

New Zealand, South Australia, Western Australia

Summary >>

<< Reserves

All about Blue Granite and Dacite Properties

Know all about Blue Granite and Dacite properties here. All properties of rocks are important as they define the type of rock and its application. Blue Granite and Dacite belong to Igneous Rocks.Texture of Blue Granite is Phaneritic whereas that of Dacite is Aphanitic to Porphyritic. Blue Granite appears Shiny and Dacite appears Vesicular. The luster of Blue Granite and Dacite is subvitreous to dull. Blue Granite is available in black, brown, light to dark grey, white colors whereas Dacite is available in bluish - grey, brown, grey, light to dark grey colors. The commercial uses of Blue Granite and Dacite are cemetery markers, commemorative tablets, creating artwork, curling.