816.1 Pierre-Élisabeth de FONTANIEU. L'art de faire les cristaux colorés imitans les pierres précieuses. 8° Paris: de l'imprimerie de monsieur 1778 Ferguson Nat Union Cat British Library [Illustrations:- 1. Table inserted after p28. 124x199mm. Listing precious stones and the formulae for making artificial versions. 2. Engraving inserted after item 1. 305x194mm. Cylindrical tower furnace with cutaway diagram of interior structure.]