The hip black and white look of this barrel cactus cut and placed on alternating black sand and table salt is made even more dramatic with the addition of vertical porcupine quills. "Pour one mound of table salt across each side of the glass cube. Layer black fine grained sand on top. Repeat. Layer with white aquarium pebble before placing cactus," says Anne Gunnels of Honey + Gunn Succulents. The table design is by @pleasebeseatedrentals.