The rocks you choose will help set the tone for the rest of your garden. Tawny beach pebbles or river rocks add warmth, while white marble chips help brighten up shady areas. Flat terracotta stones complement a tropical landscape, but can seem out of place in a more formal garden. For a minimalist modern landscape or Polynesian-themed garden, try black lava rocks. Check out photos of rockscapes online to see what appeals to you. Because stones last indefinitely, it’s important to choose a look you’ll be happy with for many years.