Luck would have it that August babies not only have the earthy tone of Peridot as their birthstone but also spinel and sardonyx. Spinel, often mistaken for ruby and saphire, was the original birthstone of August until Peridot was added and became the more popular of the two. Sardonyx, a layered red-ish rock was later added into August. As peridot is the most popular gem of the three, we've put together some inspo for those August babies out there. PSA: If you are an August baby aren't taking…