Natural Obsidian Test Stone Size

SKU: 51-264

Variant Code: Extra Large
Price:
Sale price$49.95

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Our natural obsidian testing stones have are the perfect stone for acid testing. These stones are smooth to the touch, yet provide a clear testing mark when you scratch the surface with the same piece. This will provide you with more consistent and reliable readings.

WARNING:
California's Proposition 65

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Approximate Diameter5" to 6.5"

How to Conduct an Acid Scratch Test

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