Gemology.- Boyle (Robert) An Essay about the Origine & Virtues of Gems,, first edition, William Godbid, and are to be sold by Moses Pitt at the White Hart in Little Britain, 1672.

Gemology.- Boyle (Robert) An Essay about the Origine & Virtues of Gems, first edition, title within double-ruled woodcut border, water-stained, contemporary calf, corners worn, rubbed and stained, [Fulton 96; Wellcome II, p.222; Wing B3947], 8vo, William Godbid, and are to be sold by Moses Pitt at the White Hart in Little Britain, 1672.

⁂ 'The Essay marks the beginning of the modern development in knowledge of crystal structure.' (Fulton). Boyle observed the formation of crystals from solution and experimented using gems in his own collection, leading him to several important conclusions including that gems and similar crystaline minerals had similar origins and structures.