Labradorite.
Labradorite is the provincial mineral for Newfoundland and Labrador. It is found in abundance near the community of Nain. It has coarse cleavage and shows a play of colours mainly in shades of blue and green, but yellow, red, and gold varieties are also found. Jamie Meyer provided the sample of labradorite in the photograph.

From Geological Survey of Newfoundland and Labrador - "Minerals of Newfoundland and Labrador - Industrial Minerals." http://www.gov.nl.ca/mines&en/geosurvey/. Courtesy of David Liverman, Government of Newfoundland and Labrador.