Diamonds spawning Minecraft

Example diamond spawn pattern in an 8x8 chunks area:

| = = | = = |
| 0 0 | D 0 |
| D 0 | D 0 |
| = = = = = |
| D 0 | D D |
| D 0 | D 0 |
| = = | = = |

Blank: placeholder
0: Average stuff, low chance of diamonds
D: 'Diamond chunk', high chance of diamonds
|: Same as 0. Placed for enhanced visualization.
=: Same as 0. Placed for enhanced visualization.

In 1 diamond chunk, expect to find about min. 2 max. 5 diamond veins (min. 2 small, max 3 small 2 large)
In 1 average chunk, expect to find about min. 1 max. 3 diamond veins (min. 1 small, max 2 small 1 large)
[Small=4-5 diamond, large=8-9 diamond]

NOTE: All details listed here were obtained from observation.