AAA-206 50lbs. 8-16 Pea Gravel. Pea gravel is able to contain moisture and protect soil from temperature and wear and tear due to its durable nature. Made from semi-rounded quartz or river rock, pea gravel is perfect for walking paths and is a wonderful complement to water features. This adaptable gravel can be used to strengthen the border of any garden and help retain water. Featuring an eye-pleasing array of colors and rock sizes, pea gravel is the perfect option for to give your landscape project a desirable look.