Perlite

Perlite, also called pearlstone is a natural glass with concentric cracks such that the rock breaks into small pearl-like bodies. It is formed by the rapid cooling of viscous lava or magma.

Bibliography



• Cox et al. (1979): The Interpretation of Igneous Rocks, George Allen and Unwin, London.
• Howie, R. A., Zussman, J., & Deer, W. (1992). An introduction to the rock-forming minerals (p. 696). Longman.
• Le Maitre, R. W., Streckeisen, A., Zanettin, B., Le Bas, M. J., Bonin, B., Bateman, P., & Lameyre, J. (2002). Igneous rocks. A classification and glossary of terms, 2. Cambridge University Press.
• Middlemost, E. A. (1986). Magmas and magmatic rocks: an introduction to igneous petrology.
• Shelley, D. (1993). Igneous and metamorphic rocks under the microscope: classification, textures, microstructures and mineral preferred-orientations.
• Vernon, R. H. & Clarke, G. L. (2008): Principles of Metamorphic Petrology. Cambridge University Press.


Photo
Foto
perliti0051(2).jpg

Concentric cracks (Perlite) in a Obsidian, Germany. PPL image, 2x (Field of view = 7mm)
perliti0051(4).jpg

Concentric cracks (Perlite) in a Obsidian, Germany. PPL image, 2x (Field of view = 7mm)
perliti0051(5).jpg

Concentric cracks (Perlite) in a Obsidian, Germany. PPL image, 2x (Field of view = 7mm)
perlitigrecia(2).jpg

Concentric cracks (Perlite) in a Obsidian, Greece. PPL image, 10x (Field of view = 2mm)
perlitigrecia(3).jpg

Concentric cracks (Perlite) in a Obsidian, Greece. PPL image, 10x (Field of view = 2mm)
perlitigrecia(4).jpg

Concentric cracks (Perlite) in a Obsidian, Greece. PPL image, 10x (Field of view = 2mm)
perlitigrecia(5).jpg

Concentric cracks (Perlite) in a Obsidian, Greece. PPL image, 10x (Field of view = 2mm)
perlitigrecia(6).jpg

Concentric cracks (Perlite) in a Obsidian, Greece. PPL image, 10x (Field of view = 2mm)
perlitigrecia(8).jpg

Concentric cracks (Perlite) in a Obsidian, Greece. PPL image, 10x (Field of view = 2mm)
perlitigrecia(9).jpg

Concentric cracks (Perlite) in a Obsidian, Greece. PPL image, 10x (Field of view = 2mm)
perlitigrecia(10).jpg

Concentric cracks (Perlite) in a Obsidian, Greece. PPL image, 10x (Field of view = 2mm)
perlitigrecia(11).jpg

Concentric cracks (Perlite) in a Obsidian, Greece. PPL image, 10x (Field of view = 2mm)
perliti2012a(2).jpg

Concentric cracks (Perlite) in a Obsidian, Greece. PPL image, 10x (Field of view = 2mm)
perliti2012a(3).jpg

Concentric cracks (Perlite) in a Obsidian, Greece. PPL image, 10x (Field of view = 2mm)
perliti2012a(4).jpg

Concentric cracks (Perlite) in a Obsidian, Greece. PPL image, 10x (Field of view = 2mm)
perliti2012a(5).jpg

Concentric cracks (Perlite) in a Obsidian, Greece. PPL image, 10x (Field of view = 2mm)
perliti2012a(6).jpg

Concentric cracks (Perlite) in a Obsidian, Greece. PPL image, 10x (Field of view = 2mm)
perliti2012a(7).jpg

Concentric cracks (Perlite) in a Obsidian, Greece. PPL image, 10x (Field of view = 2mm)
perliti2012a(8).jpg

Concentric cracks (Perlite) in a Obsidian, Greece. PPL image, 10x (Field of view = 2mm)
perliti2012a(9).jpg

Concentric cracks (Perlite) in a Obsidian, Greece. PPL image, 10x (Field of view = 2mm)
frattureperlitiche(2).jpg

Concentric cracks (Perlite) in a Obsidian, Greece. PPL image, 10x (Field of view = 2mm)
frattureperlitiche(3).jpg

Concentric cracks (Perlite) in a Obsidian, Greece. XPL image, 10x (Field of view = 2mm)
perliti2013(2).jpg

Concentric cracks (Perlite) in a Obsidian, Greece. PPL image, 10x (Field of view = 2mm)
perliti2013(3).jpg

Concentric cracks (Perlite) in a Obsidian, Greece. PPL image, 2x (Field of view = 7mm)
perliti2013(4).jpg

Concentric cracks (Perlite) in a Obsidian, Greece. PPL image, 2x (Field of view = 7mm)
perliti2013(10).jpg

Concentric cracks (Perlite) in a Obsidian, Greece. PPL image, 2x (Field of view = 7mm)
perliti2013(11).jpg

Concentric cracks (Perlite) in a Obsidian, Greece. PPL image, 2x (Field of view = 7mm)
perliti2013(5).jpg

Concentric cracks (Perlite) in a Obsidian, Greece. PPL image, 10x (Field of view = 2mm)
perliti2013(6).jpg

Concentric cracks (Perlite) in a Obsidian, Greece. PPL image, 10x (Field of view = 2mm)
perliti2013(7).jpg

Concentric cracks (Perlite) in a Obsidian, Greece. PPL image, 10x (Field of view = 2mm)
perliti2013(8).jpg

Concentric cracks (Perlite) in a Obsidian, Greece. PPL image, 10x (Field of view = 2mm)
perliti2013(9).jpg

Concentric cracks (Perlite) in a Obsidian, Greece. PPL image, 10x (Field of view = 2mm)