Function 1This kit is used to verify the gold content of objects2This product kit is only suitable for gold. 3The acid changes color depending on the purity. 4Very easy to use. Simply apply a drop of this solution to a small sample of the object to be tested. 5The product kit consists of high purity graphite stone and acid test waterSpecificationFeaturesThis kit is used to verify the gold content of objectsThis product set is only suitable for gold.The acid changes color depending on its purity.Very easy to use. Just apply a drop of this solution to a small sample of the object to be tested. The product kit consists of high purity graphite stone and acid test water.SpecificationMaterial High purity graphite stone and acid test waterGraphite Stone Size Appro. 4.1 1.1 7.2 cm 1.61 0.43 2.83 inchesAcidity Test Water Size Appro. 3 1.2 4.7 cm 1.18 0.47 1.85 inchesTotal weight 90 gType Jewelry Tools EquipmentPackage list1 Graphite Stone3 ml Acid test waterNoteHow to useIf you want to test whether your gold ring is genuine or not, you just need to rub black stone and leave a small sample on the stone.Apply a drop of this solution to a small sample of the object to be tested on the test stone.Then the real gold will remain on the touchstone, the fake will dissolve or oidize to blueIf the sample disappears, the object is under the carat of the solution..wangedittetfontfamilyArialimportant.wangedittet table bordertop 1p solid000borderleft 1p solid000.wangedittet table td,.wangedittet table th borderbottom 1p solid000borderright 1p solid000padding 3p 5p.wangedittet table th tetalign center