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1 grams) Alloy Type Master Alloy Primary Application Investment casting
Switzerland Origin Switzerland Available Options
gold-plated
from extra coarse (00) to extra fine (6)
Improved workability and extended open working time
Premium Gold Test Stone-Thick-Made in the USA- 2-1/2" X 1-1/2" X 1/2" Stakes 1 grams) Alloy Type MasterA professional grade gold testing stone for precious metal identification, this thick touchstone is made in the USA from natural Arkansas black novaculite a premium material quarried and cut domestically. At 2 1 2" 1 1 2" 1 2", the generous thickness provides a durable, long lasting testing surface suited for daily bench use. Also referred to as streak stones or touchstones, this tool is a trusted standard for jewelers performing acid based precious
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