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Touchstone (assaying tool): Revision history


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  • curprev 13:5613:56, 1 September 2021 2600:1700:fa4:60e0:40d5:9084:8330:2be8 talk 2,499 bytes 0 Karat in this article was spelled with a C, which is only used to designate the weight of diamonds and semi-precious stones. Karat with a K is used to designate the purity of the precious metal, gold. (Au) Accordingly, karat with a K, is for the purity of gold. And carat with a C is for the weight in diamonds and semi-precious stones. undo Tags: Mobile edit Mobile web edit

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  • curprev 12:4912:49, 16 May 2019 Donna Windish talk contribs 2,063 bytes +174 changed "The touchstone was used by the Indus Valley Civilization about 3500 BC for testing the purity of soft metals." to "The touchstone was used during the Harappah period of the Indus Valley Civilization ca. 2600-1900 BC for testing the purity of soft metals."; added citation for same undo Tag: Visual edit

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  • curprev 09:4609:46, 9 September 2018 Jonpatterns talk contribs 1,820 bytes +46 History: The touchstone was used by the Indus Valley Civilization about 3500 BC for testing the purity of soft metals.{{subst:CN}} It was also was used in Ancient Greece.<ref>{{Cite book |last=Bisht |first=R. S. |year=1982 |chapter=Excavations at Banawali: 1974-77 |editor-last=Possehl |editor-first=Gregory L. |title=Harappan Civilization: A Contemporary Perspective |location=New Delhi |publisher=Oxford and IBH Publishing Co. |pages=113–124}}</ref> undo

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