Geffrey Whitney, A choice of emblemes (Leiden, 1586)
A hand from the clouds is pushing a gold coin over a touch-stone to test its purity

Sic spectanda fidesLatin
Thus faith is to be tested
To George Manwaringe Esquier
22D sound25D13(GOLD) minerals and metals: gold26A clouds31A2245(+939):31A2744 hand (+ other neutral connotations)❧kicking something31A2763(+0) floating in the air (+ variant)41D2664 ring44A5 symbols of particular nations, states, districts, etc.44B191 crown (symbol of sovereignty)44B194 coat of arms (symbol of sovereignty)46A121 coronet46B311 coin47F14 test, trial (~ production)48A98331 fleur-de-lis ~ ornament48A9857(CROWN) (CROWN) ornaments derived from objects (CROWN)48C26 medal (considered as a piece of sculpture, regardless of its specific function)48C34(TOUCH-STONE) tools, implements of craftsman: touch-stone49L8 inscription52B53(+4) Proof (+ emblematical representation of concept)54FF11(+4) Adversity, Misfortune, Bad Luck; 'Fortuna infelice', 'Infortunio' (Ripa) (+ emblematical representation of concept)57A614(+4) Faithfulness, 'Bona Fide' (+ emblematical representation of concept)61B2(MANWARING, George)3 historical person (MANWARING, George) - other representations to which the NAME of a historical person may be attached (MANWARING, George)61D(FRANCE) geographical names of countries, regions, mountains, rivers, etc. (FRANCE) (FRANCE)86(FRANCISCUS DEI GRATIA FRANCIAE REX) proverbs, sayings, etc. (FRANCISCUS DEI GRATIA FRANCIAE REX)86(SIC SPECTANDA FIDES) proverbs, sayings, etc. (SIC SPECTANDA FIDES)Record ID: embstma_1667_emblem144
This emblem on the Iconclass site: https://iconclass.org/view/embstma_1667_emblem144
Copy: University Library, Glasgow, Stirling Maxwell 1667