Designs additionally include friezes, large pier mirrors, and marble mantles. During this era garments such as cloaks, mantles, and stockings remained unchanged. Their mantles should be simple, not like Bulgarian cloaks. The draperies of the mantles were at first larger. The first historical application of lanthanum was in gas lantern mantles. When full mantles and sopra vests are worn a black velvet Tudor-style hat is included. Unique habitats are found on alvars, extremely level expanses of limestone with thin soil mantles. Von Welsbach was looking for thorium for his newly invented incandescent mantles. The Spanish soldiers found gold, emeralds, silver, mantles and other valuables in Tunja. Again, Lord Lyon is no longer granting these heraldic mantles. The ages of these mantles are Mesozoic to Early Cenozoic. Giant squid have small fins at the rear of their mantles used for locomotion. These were more conical looking compared with the half cone shaped initial mantles. Giant clams (Tridacna) have ocelli that allow light to penetrate their mantles. Because of this, there are concerns about the safety of thorium mantles.