Clue: Upper limit of mineralogists' Mohs scale

Answer: TEN

Length: 3

---

Similar Clues:

• Ones on the Mohs scale (TALCS with 5 letters)
• They mark the upper limit of tree growth (TIMBERLINES with 11 letters)
• Mid-Mohs scale mineral (OPAL with 4 letters)
• Softest mineral on the Mohs scale (TALC with 4 letters)
• It's around 6 on the Mohs scale (OPAL with 4 letters)
• One end of the Mohs' scale (TALC with 4 letters)
• Rating a 10 on the Mohs scale (HARDEST with 7 letters)
• It's 6.5 on the Mohs scale (OPAL with 4 letters)
• No. 1 on the Mohs' scale (TALC with 4 letters)
• Diamond, on the Mohs scale (TEN with 3 letters)