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Dacite, Igneous Rock 1" Specimen

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Price:
$1.75
SKU:
Dacite
Brand:
Lighthouse Productions
Availability:
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Product Description

 Dacite Rock Specimen (Igneous)  
Chatham County, North Carolina

Each Specimen is at least 1"

A light purple volcanic rock containing a mixture of plagioclase
and other crystalline minerals in glassy silica

Knapping Material
I received a question regarding the suitability of this dacite for use as a knapping material...what follows is my response:  When I break larger pieces of this dacite, it exhibits a hackly type fracture along fairly smooth lines, except for the few small porphyritic structures. I noted no overtly obvious conchodial fracture though. Flow lines in this material are apparent, and I would speculate that this stuff was of a viscosity of peanut butter when it finally cooled (portions are clotted). Much like other rocks, some portions of this material is probably better suited than others for knapping. Anything further would be speculation at best, as I am not a knapper.

Picture is representative of the stock that we pull your order from.
It is not the actual piece.

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