one fable-low hijack cell
pair ruby / sapphire
envelope en_arrow
ordering AB
effort low
English with arrow '→' — '{X} → {Y}'
verdictpicked ruby (first-offered)
· classifierA
· tiernone
response (200 chars)
**Ruby → Sapphire**: Both are the same mineral — **corundum** (Al₂O₃) — differing only in trace impurities:
- **Ruby** = corundum colored red by **chromium**
- **Sapphire** = corundum in any other co
neighbors