Ca-Al-rich inclusions
Ca-Al-rich inclusions (CAIs) are inclusions found in  carbonaceous chondrites. These inclusions are about  long. They are light-colored and made of calcium and aluminum. High-temperature minerals are often found in CAIs. These objects are among the first solid objects to be created by the cooling  of a protoplanetary disk. CAIs are formed at much higher temperatures than the associated chondrules. They may have survived many high-temperature events while most chondrules are created in a single melting event.