Cheapest priced copy (Mirrodin): $0.35 at Card Kingdom, near mint, their price list as of .
Granite Shard 
Artifact · Uncommon · Mirrodin · #182
{3}, {T} or {R}, {T}: This artifact deals 1 damage to any target.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Mirrodin | 182 | Uncommon | $0.35 | $0.49 |
One ruling from Wizards of the Coast
- 4 October 2004You can pay either of the two costs (but not both at the same time) to activate the ability.