COBALT – Encyclopaedia Iranica
· COBALT (sange lājavard "blue stone," also applied to lapis lazuli and ultramarine; lājavarde kāšī "ceramic blue"; lājavarde solaymānī "Solaymān blue"), a chemical element that imparts a blue color to glass and glazes and to certain pigments. The term lājavard actually refers to lapis lazuli (, lājavarde aṣl "genuine lapis lazuli," lājavarde ...