301 Archduchess Isabella's Peridot and Diamond Tiara: These particular peridots are quite fine with good purity huge size and a deep olive color. There are five peridot stones in the tiara each surrounded by a scrolling foliate diamond frame. The tiara is part of a parure which includes a set of earrings a large brooch (or devant de corsage) and a necklace; the necklace includes seven drops which can be removed and mounted upright on the tiara.