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Gold cultural heritage objects: a review of studies of provenance and manufacturing technologies [58] Guerra M F, Perea A and Calligaro T 2002 Coins and crowns The C haracterisation of the V ...

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Hardnesses of the elements (data page) - Wikipedia

See also. Mohs scale of mineral hardness; Vickers hardness test; Brinell scale

Greywacke - Wikipedia

Greywacke or graywacke (German grauwacke, signifying a grey, earthy rock) is a variety of sandstone generally characterized by its hardness, dark color, and poorly sorted angular grains of quartz, feldspar, and small rock fragments or lithic fragments set in a compact, clay-fine matrix.

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Provenance of the gold of the Early Bronze Age Nebra Sky ...

Provenance of the gold of the Early Bronze Age Nebra Sky Disk, central Germany: geochemical characterization of natural gold from Cornwall A NJA EHSER 1,*,G REGOR BORG 1 and E RNST PERNICKA 2 1 ...