Essexite (Nepheline Gabbro) - Rock PackProduct ID: 50
Essexite, formely known as nepheline monzo gabbro or simply nepheline gabbro is a coarse grained plutonic rock belonging to the igneous category which is named due to the large abundance of it found in Essex County, Massachusetts, USA. These particular samples of Nepheline gabbro contain prominent augite crystals and come from Craighead Quarry. Scotland, UK and were at one time historically used as curling stones. Samples are supplied in a strong polythene bag with a total of 10 indivdual smaples each measuring approx 2" x 2" in size.