Snowflake Obsidian Slide

Snowflake Obsidian Slide In Cross Polarised Light
Snowflake Obsidian Slide In Cross Polarised Light Snowflake Obsidian Slide In Cross Polarised Light Snowflake Obsidian Slide In Polarised Light Snowflake Obsidian Slide In Polarised Light
Snowflake Obsidian Slide
Excl. Tax: £15.00 Incl. Tax: £18.00

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Snowflake Obsidian thin section microscope slides which exhibit radially clustered crystals of cristobalite within a glass matrix. Each section is made to 30 microns thickness. The glass is 46 x 27 mm in size, supplied in a protective card sleeve with a label, ideal for microscopy.
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Snowflake Obsidian thin section microscope slides which exhibit radially clustered crystals of cristobalite within a glass matrix. Obsidian, also known as 'volcanic glass' is a felsic, extrusive igneous rock. Crystal growth is minimal / absent within obsidian due to rapid solidification rates which inhibit crystal growth thus giving the rock a glassy appearance. In the case of snowflake obsidian, over time, silica molecules within the glass rearrange into an organised crystal pattern i.e. crisobalite; this process is known as ' devitrification '. This material was collected in Anatolia, Turkey. Each section is made to 30 microns thickness. The glass is 46 x 27 mm in size, supplied in a protective card sleeve with a label, ideal for microscopy.
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