Diamond United Church Cemetery was established in 1863.
To find the cache, you will need to visit three monuments.
The posted coordinates will bring you to the first of the monuments. It is one of the tallest monuments in the cemetery (perhaps the tallest) and has two urns.
With your back to this monument, and while facing the back of the cemetery, search for a shorter monument with two pillars. Framed between the two pillars, you will see a third monument. This is where you will need to head.
Looking at this headstone, which has a 4 letter name on the top, you will see the passing dates of a husband and wife. Call the husband's year of death ABCD, and that of his wife EFGH.
Now some simple math will take you to the cache:
NORTH 45 23.(D-H)(F-H+C)(H*C)
WEST 76 08.(C+E)(D-G)(C+H)
As with all cemetery caches, please be respectful of your surroundings, and search only in daylight hours. Have fun!