goldnessn.

1657 H. Pinnell tr. O. Croll Philos. Reformed 197 Imperfect and impure mettalls are cleansed from their infirmities.., they are restored to their True Health, which is aureity or goldness [L. aureitas].

1727 R. Greene Princ. Philos. Expansive & Contractive Forces v. ix. 705 Nor, because the Schools have Formed but a Few Abstract Names of Substances..does it Follow, that a Thousand more might not have been as Justly Adopted into Language, as..Goldness, Ironness, Stoneness, &c.

1881 J. Owen Evenings with Skeptics II. 487 The spirit of gold.., that which gave it its distinctive quality—its goldness, so to speak—was supposed capable of being separated from its own matter and infused into other material substances.

1910 ‘O. Henry’ Strictly Business ii. 27 But, ah, Senor Kelley—the senoras with hair of much goldness, and admirable fatness—they are magnificas.

2015 Bristol Post (Nexis) 30 Jan. 28 It's the shimmering goldness that first hits you when you arrive at..the luxurious Second Floor Restaurant at Harvey Nichols.