kimberlite

Kimberlite
RocksForKids.com

Kimberlite is an interesting rock because it could indicate that there are diamonds to be found nearby.
SPECIMEN ORIGIN: Rock - Webequie, Ontario, CANADA Drill Core Slice - Northern Ontario, CANADA	Notice how similar the samples of kimberlite are to the dark colour of the vial of limberlite indicator minerals.
SPECIMEN ORIGIN: Rock - Webequie, Ontario, CANADA The exterior "skin" of this kimberlite sample shows the frothiness associated with volcanic activity.