Home
Compare Rocks


Hawaiite and Dacite


Dacite and Hawaiite


Definition

Definition
Hawaiite is volcanic rock that resembles basalt. It is an olivine basalt with intermediate composition between alkali olivine and mugearite   
Dacite is a volcanic igneous rock which is rintermediate in composition between andesite and rhyolite   

History
  
  

Origin
Hawaii Islands   
Romania and Moldova, Europe   

Discoverer
Joseph Iddings   
Unknown   

Etymology
From Hawaii Islands   
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   
Igneous Rocks   

Sub-Class
Durable Rock, Medium Hardness Rock   
Durable Rock, Soft Rock   

Family
  
  

Group
Volcanic   
Volcanic   

Other Categories
Opaque Rock   
Fine Grained Rock, Medium Grained Rock, Opaque Rock   

Texture

Texture
Glassy, Massive, Porphyritic, Scoriaceous, Vesicular   
Aphanitic to Porphyritic   

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

Maintenance
Less   
Less   

Durability
Durable   
Durable   

Water Resistant
Yes   
No   

Scratch Resistant
Yes   
No   

Stain Resistant
No   
No   

Wind Resistant
Yes   
No   

Acid Resistant
No   
No   

Appearance
Dull and Soft   
Vesicular   

Uses

Architecture
  
  

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

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

Other Architectural Uses
Curbing   
Curbing   

Industry
  
  

Construction Industry
As Dimension Stone, Cobblestones, Rail Track Ballast, Roadstone   
As Dimension Stone, Construction Aggregate, for Road Aggregate, Landscaping   

Medical Industry
Not Yet Used   
Not Yet Used   

Antiquity Uses
Artifacts   
Artifacts   

Other Uses
  
  

Commercial Uses
Creating Artwork, Sea Defence   
Commemorative Tablets, Creating Artwork   

Types

Types
Not Available   
Footwall Dacite, Hanging wall Dacite, Tuff and Biotite Dacite   

Features
Has High structural resistance against erosion and climate, Very fine grained rock   
Host Rock for Lead, Is one of the oldest rock   

Archaeological Significance
  
  

Monuments
Used   
Not Yet Used   

Famous Monuments
Easter Island in the Polynesian Triangle, Pacific Ocean   
Not Applicable   

Sculpture
Not Yet Used   
Not Yet Used   

Famous Sculptures
Not Applicable   
Not Applicable   

Pictographs
Used   
Used   

Petroglyphs
Used   
Used   

Figurines
Not Yet Used   
Not Yet Used   

Fossils
Absent   
Absent   

Formation

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

Types of Metamorphism
Impact Metamorphism   
Burial Metamorphism, Cataclastic Metamorphism   

Weathering
Yes   
Yes   

Types of Weathering
Biological Weathering   
Biological Weathering, Chemical Weathering, Mechanical Weathering   

Erosion
No   
Yes   

Types of Erosion
Not Applicable   
Chemical Erosion   

Properties

Physical Properties
  
  

Hardness
6   
2-2.25   

Grain Size
Not Applicable   
Medium to Fine Coarse Grained   

Fracture
Conchoidal   
Conchoidal   

Streak
Not Available   
White   

Porosity
Less Porous   
Less Porous   

Luster
Not Available   
Subvitreous to Dull   

Compressive Strength
37.40 N/mm2   
28
Not Available   

Cleavage
Not Applicable   
Perfect   

Toughness
Not Available   
Not Available   

Specific Gravity
Not Available   
2.86-2.87   

Transparency
Opaque   
Translucent   

Density
Not Available   
2.77-2.771 g/cm3   

Thermal Properties
  
  

Specific Heat Capacity
Not Available   
0.92 kJ/Kg K   
10

Resistance
Heat Resistant, Pressure Resistant, Wear Resistant   
Heat Resistant, Impact Resistant, Pressure Resistant, Wear Resistant   

Reserves

Deposits in Eastern Continents
  
  

Asia
India, Russia   
Not Yet Found   

Africa
South Africa   
Not Yet Found   

Europe
Iceland   
France, Greece, Romania, Scotland, Spain   

Others
Hawaii Islands   
Not Yet Found   

Deposits in Western Continents
  
  

North America
Canada, USA   
USA   

South America
Brazil   
Argentina, Bolivia, Chile, Colombia, Ecuador, Peru, Venezuela   

Deposits in Oceania Continent
  
  

Australia
Not Yet Found   
New Zealand, South Australia, Western Australia   

Summary >>
<< Reserves

All about Hawaiite and Dacite Properties

Know all about Hawaiite and Dacite properties here. All properties of rocks are important as they define the type of rock and its application. Hawaiite and Dacite belong to Igneous Rocks.Texture of Hawaiite is Glassy, Massive, Porphyritic, Scoriaceous, Vesicular whereas that of Dacite is Aphanitic to Porphyritic. Hawaiite appears Dull and Soft and Dacite appears Vesicular. The luster of Hawaiite is not available while that of Dacite is subvitreous to dull. Hawaiite is available in black, brown, light to dark grey colors whereas Dacite is available in bluish - grey, brown, grey, light to dark grey colors. The commercial uses of Hawaiite are creating artwork, sea defence and that of Dacite are commemorative tablets, creating artwork.

Compare Igneous Rocks

Igneous Rocks

Igneous Rocks

» More Igneous Rocks

Compare Igneous Rocks

» More Compare Igneous Rocks