Hi Cariboo5, If I found this, Especially in Canada, I would be Soo Excited! This could be a Kimberlite/Lamphorlite "Bomb". These rocks are blown out of Kimberlites which are carrot shaped volcano dykes and could be an indicator of Diamond ferrous Kimberlite. These rocks don't travel too far from the kimberlite so you could be within a one mile to a mile and a half circumference of a Kimberlite! Look for Diamonds! and pyrope, Garnets! etc...Look up what rough diamonds look like and the many colors.
Use Google Earth to search your area and look for "Blueish ground" and paths where there is no vegetation (the soil around a Kimberlite isn't conducive to grow trees) and look for small round "Lakes" with a whitish ring around the beach area. It may be filled with water (the center) or not.
In the State-Line district of Colorado/Wyoming alone there is said to be 2000 Kimberlites that are unexplored! Canada is recently becoming the Top 3 producers of Diamonds in the World...Wow!...Have fun hunting and Good Luck!
MinerGirl