Can You Get Diamonds in Harvest Moon (Game Boy / GBC)? No—Mining and Gems Debuted in Later Entries

No. The original Harvest Moon (Game Boy, 1997) and Harvest Moon GBC (2000) **do not have diamonds or gemstones**.

What They Have

• Crops, livestock, tools, furniture, festivals, marriage candidates.
• Mining is **absent**—no mine, no ores, no gems.
• Valuables: Golden Egg (chicken), Golden Wool (sheep), high-quality crops/flowers.

When Did Diamonds Appear?

• Harvest Moon 64 (N64, 1999): First mining (Winter Mine) → ores (Gold, Silver, Copper) + **Diamonds** (rare, sell 5000G, needed for best tools).
• Harvest Moon: Back to Nature (PS1, 1999): Same mine system.
• Harvest Moon: Friends of Mineral Town (GBA, 2003): Spring/Summer/Fall/Winter Mines → Diamonds on lower floors.

If you're playing the GB/GBC game: Focus on crop rotation, animal affection, and festival wins. Diamonds aren't in the code.