Renal stones are formed of calcium carbonates/calcium oxalates.

Explanation

**Step-by-Step Solution:**

1. **Understanding Renal Stones**: Renal stones, commonly known as kidney stones, are hard deposits that form in the kidneys. They are primarily composed of minerals and acid salts.

2. **Formation Process**: These stones form when minerals and acid salts in the urine stick together. This typically occurs in concentrated urine, where the solute concentration is high, leading to precipitation of these substances.

3. **Key Components**: The primary components of renal stones are calcium oxalate and calcium carbonate. While both can contribute to stone formation, they have different implications in the body.

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