Antique 1914 Lithograph Print Set – “Minerals & Gemstones"Antique 1914 lithographic print set featuring Minerales and Piedras Preciosas, two matching scientific illustrations from the same early 20th century Spanish series. Each print presents a numbered grid of minerals and gemstones, rendered in rich tones with precise detailing and a clean, structured layout. Consistent in size, typography, and palette, they are designed to be displayed together. Printed on aged paper with a warm patina, both are mounted