hawkantiques_____fine antique jewellery hawkantiques_____fine antique jewellery
About Precious Metals
| 24 Kt | 1000/1000 |
| 22 Kt | 916/1000 |
| 18 Kt | 750/1000 |
| 14 Kt | 585/1000 |
| 12 Kt | 500/1000 |
| 9 Kt | 375/1000 |
| Color | Au | Ag | Cu | Ni | Zn | Pd | Fe |
| Light Yellow | 585 | 320 | 96 | ||||
| Yellow | 585 | 280 | 135 | ||||
| Warm Yellow | 585 | 230 | 185 | ||||
| Rose | 585 | 140 | 275 | ||||
| Red | 585 | 70 | 345 | ||||
| Green | 587 | 390 | 23 | ||||
| White (hard) | 585 | 185 | 155 | 75 | |||
| White (soft) | 585 | 185 | 80 | 150 | |||
| Yellow | 750 | 122 | 123 | ||||
| Red | 750 | 60 | 190 | ||||
| Green | 750 | 250 | |||||
| Blue | 750 | 250 | |||||
| White | 750 | 55 | 155 | 40 |
White gold jewellery
by the end of 1800 beginning of 1900 a new process, with the use of electricity made possible the plating of a layer of gold or platinum with extreme ease and very good results.
Mercury /Plating Gilding:
either it was performed over a base metal or over lower carat gold; an amalgam of gold and mercury was spread over the metal and then brought to the necessary temperature need to the mercury to evaporate leaving a thick layer of 24 or 22 Kt gold. The mercury vapours originated are highly toxic and poisonous.
Gold Filled:
joining a layer or layers of gold alloy to a base metal alloy, then rolling or drawing as required for thickness of material.
Rolled gold:
a thin leaf of gold used in plating lesser metals. Method varies from rolling to electroplating a coat of gold over an inferior metal.
Pinchbeck metal:
this alloy was concealed by the famous English watch maker Sir. Christopher Pinchbeck (1670-1732) and is composed by the 83-93% of copper.