Before I buy a wet tile saw ...

[eli@fijireefrock.com]

To be honest i have looked for couple months before I decided to go for a bandsaw with a diamond blade. The only downfall I have IS that my saw only gives me 3.5 or 4" of cutting thickness.
For rocks cutting I used a shop wet saw in the past 18" blade but its too $$ and commercially. ..
for cutting rocks in half there are many tools that could be used it all depends on what level of cutting you really want. .
Diamond blade grinder I always have on hand for rocks and I seen people using one on coeals (not at all my recomendation) but for couple cuts on the back side of the coral its fine.