Hard water stains can dull the beauty of your onyx outdoor table, but with the right approach, you can restore its shine. Here’s a step-by-step guide to safely remove these stubborn marks.

1. Mix a Gentle Cleaning Solution: Combine warm water with a few drops of mild dish soap. Avoid acidic or abrasive cleaners, as they can damage onyx.

2. Apply the Solution: Dip a soft cloth or sponge into the mixture and gently scrub the stained areas. For tougher stains, let the solution sit for a few minutes before wiping.

3. Rinse Thoroughly: Use clean water to rinse off any soap residue, then dry the surface with a microfiber cloth to prevent new water spots.

4. Use a Baking Soda Paste for Stubborn Stains: Mix baking soda with water to form a paste, apply it to the stain, and let it sit for 10-15 minutes before gently scrubbing and rinsing.

5. Seal the Onyx (Optional): To prevent future stains, consider applying a stone sealer designed for onyx. Follow the manufacturer’s instructions for best results.

Regular maintenance and prompt cleaning of spills will keep your onyx table looking pristine for years. Avoid harsh chemicals and opt for gentle, stone-safe methods to preserve its elegance.