Correct option is B
The Correct Answer Is: (B) Aluminium Oxide
Explanation:
Ruby is a precious gemstone composed mainly of aluminium oxide (Al₂O₃) with trace amounts of chromium (Cr).
The presence of chromium gives ruby its characteristic red color. It belongs to the corundum mineral family, where pure corundum is colorless, but trace elements like chromium give it a red hue.
Information Booster:
- Chemical Formula: Al₂O₃ (Aluminium Oxide)
- Color: Red (due to Chromium impurities)
- Hardness: 9 on the Mohs scale, making it one of the hardest natural minerals.
- Uses:
- Jewelry (rings, necklaces, bracelets, etc.).
- Industrial applications (watch components, lasers, and scientific instruments).
- Famous Ruby Sources:
- Myanmar (Burma) – Produces the finest rubies.
- Sri Lanka, Thailand, India, and Madagascar.
Additional Knowledge:
- Sodium Chloride (NaCl): This is common salt .
- Carbon (C): Carbon forms diamonds and graphite.
- Potassium (K): Potassium is found in feldspar and mica minerals.
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