What is another word for certified loose?
Pronunciation: [sˈɜːtɪfˌa͡ɪd lˈuːs] (IPA) 
Certified loose refers to a diamond or any other precious stone that has been evaluated, graded, and authenticated by an expert gemologist as being of high quality. Synonyms for this term include certified unset, certified unmounted, and certified open stock. These terms are used to describe a diamond that is not yet set in a piece of jewelry such as an engagement ring or a necklace but has undergone a thorough examination to ensure its authenticity and quality. Other synonyms for certified loose diamonds include certified wholesale diamonds, certified loose gemstones, and certified diamond inventory. A certified loose diamond is a great choice for those who want to design a custom piece of jewelry or invest in a high-quality diamond.
