PRESIDIUM SAM Manual Del Usuario página 13

Recommended testing conditions
Cleaning your gemstone prior to testing
Prepare a clean tissue or jewelry cloth. Carefully retrieve
the gemstone with tweezers and place the gemstone
face down on its table facet (Fig. 1.7).
Fig. 1.7
Gently rub the table of gemstone against the tissue/
jewelry cloth (Fig. 1.8).
Fig. 1.8
If your stone is mounted jewelry, please carefully clean
the stone (Fig. 1.9).
Fig. 1.9
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