Create your own slate coaster/plaque Create your own slate coaster/plaque Grave memorial slate heart decoration (3 ratings) made to order £9.98 Beautiful slate heart custom made with your own words. These are weatherproof and suitable for outside making them perfect to place on your loved ones resting place, a plant pot or grave stone. Hearts are natural raw slate with a rustic edged finish. They measure approx 10cm. Add your own wording, these are made to order to enable you to add your own special dates, words and names. Please ensure you double check all spellings and dates as I will use exactly as you leave via copy and paste.