If you were born in the sweltering heat of August, you are lucky enough to claim not one, but three stunning gemstones as your birthright. While most months have a single representative, August boasts a vibrant trio: Peridot, Spinel, and Sardonyx.
1. The Primary August Birthstone: Peridot
For centuries, Peridot has been the most recognized August birthstone. Known for its signature lime-green glow, it is one of the few gemstones that occurs in only one color.

Origins and History
Peridot is the gem variety of the mineral olivine. It has an extraordinary history, with some crystals found in pallasite meteorites (yes, some August birthstones are literally from outer space!). Historically, it was mined on St. John’s Island in the Red Sea and was often confused with emeralds by ancient Egyptians.
Symbolism and Meaning
- The Gem of the Sun: Ancient Egyptians called Peridot the “gem of the sun,” believing it protected its wearer from terrors of the night.
- Healing Properties: It is said to bring peace, good health, and rest to those born in August.
- Durability: With a Mohs hardness of 6.5 to 7, it is suitable for jewelry but should be handled with a bit more care than a diamond.
2. The Modern Addition: Spinel
In 2016, the Jewelers of America and the American Gem Trade Association added Spinel as an official August birthstone. This gave August babies a much wider palette of colors to choose from.

Why Spinel?
Spinel is often called the “Great Imposter” because it looks so much like ruby and sapphire. In fact, the famous “Black Prince’s Ruby” in the British Crown Jewels is actually a red Spinel!
- Colors: Available in vibrant red, cobalt blue, hot pink, and even deep violet.
- Durability: Ranking 8 on the Mohs scale, Spinel is incredibly durable and perfect for everyday wear in rings and bracelets.
3. The Heritage Stone: Sardonyx
Before Peridot took the spotlight, Sardonyx was the original August birthstone. This unique stone is a combination of two types of chalcedony: sard and onyx.

Appearance and Legend
Sardonyx features reddish-brown and white bands or layers. In ancient Rome, soldiers wore Sardonyx talismans engraved with images of Mars (the god of war) to bring courage and protection in battle.
August Birthstone Comparison Table
| Feature | Peridot | Spinel | Sardonyx |
| Color | Lime Green | Multi-color (Red, Blue, Pink) | Reddish-brown with White bands |
| Hardness | 6.5 – 7 | 8 | 6.5 – 7 |
| Primary Meaning | Protection & Light | Vitality & Joy | Courage & Happiness |
| Best For | Statement Necklaces | Everyday Rings | Vintage Talismans |