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Nib Handmade nib in 750 / 18 K gold with special engraving
000 revolutions per day
FONDELLO Fondello trasparente in vetro zaffiro
Color: Black
- handwritten
Capodagli anello oro giallo 18kt Rubino 0,72ct e Diamanti Portachiavi Nib Handmade nib in 750CAPODAGLI 0. 72CT YELLOW GOLD RUBY AND DIAMOND RING Ruby is the noblest single crystalline variety of aluminum oxide (Al2O3), a mineral known as corundum, which is highly allochromatic. It has a hardness of 9 on the Mohs scale. The Mohs scale is an empirical criterion for evaluating the hardness of materials. It takes its name from the German mineralogist Friedrich Mohs, who created it in 1812. It takes as reference the hardness of ten minerals
