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<p>[QUOTE=&quot;tomf, post: 4440516, member: 74446&quot;]Glass is perfect for tool manufacture. Has conchoidal quality with predictable fracture. Also very sharp. Think of obsidian.</p><p>This particular glass is too thin to &#039;knapp&#039; but still useful when shaped and given a working edge.</p><p>Indians would salvage settler refuse for tool material. Glass, porcelain and metal. Fairly rare to find them though.[/QUOTE]</p><p><br /></p>

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