A diamond can be chipped by a hard blow along its grain so avoid wearing when doing heavy manual work. Items of jewellery should be stored carefully and separately as diamonds can scratch each other, as well as other stones and metals. Keep any chains fastened to stop them getting tangled up in your jewellery box and keep everything out of direct sunlight, away from heating vents and windowsills. If you are travelling, keep your jewellery in a soft, cloth pouch. As with daily storage diamonds should be kept in a separate pouch to avoid damaging other items.