Q1-4 yellow diamonds in rare class

North Arrow Minerals Inc. April 21 reported that yellow diamonds recovered from the Q1-4 kimberlite at the Qilalugaq Project in Nunavut contain un-aggregated nitrogen, a defining characteristic of rare Type Ib diamonds with fancy "Canary Yellow" colors.

Type Ib diamonds are exceptionally rare.

"In fact, less than 1 percent of more than 24,000 fancy yellow diamonds investigated by the Gemological I...