birthstones · August
Peridot
August's volcanic lime · Also for this month: spinel
August wears the gem of sunlight-through-leaves: peridot, olive-green olivine born in volcanoes and occasionally delivered by meteorite. Its file: warmth without burn, protection from night-fears, the good kind of green.
Story & folklore
Egyptians mined it by night on a serpent-guarded island (Zabargad), believing it invisible by day; called it 'gem of the sun'; medieval lore set it against nightmares and evil spirits — a lantern-stone for the year's heaviest heat.
The honest paragraph
Nightmares answer to sleep hygiene faster than to olivine — our honest guide covers that beat. Peridot's true flex needs no folklore: some of it arrives inside pallasite meteorites — August-born can wear a stone with an extraterrestrial paper trail, and that's not lore, that's provenance.
The cat sleeps in the exact green shade of the garden: "Sun, filtered correctly. A science."
Birthstone meanings are tradition and story, told with affection — a lovely lens for a gift or a self-portrait, never a verdict or a promise.
Peridot history: Zabargad, Cologne and the “evening emerald”
Peridot is gem-quality olivine, a mineral common deep in the Earth’s mantle but rarely found in crystals clear enough to cut. It’s one of very few gems that come in essentially one colour, green, because the colour comes from iron in its own structure rather than from trace impurities. Its long history includes a famous case of mistaken identity. The large green stones on the medieval Shrine of the Three Kings in Cologne Cathedral were long thought to be emeralds and are now known to be peridots. Its glow under candlelight earned it the old nickname “evening emerald”.
Peridot colours and sources
- Lime to yellowish green: the most common, bright and summery.
- Pure grass green with little yellow: the most valued, especially in larger sizes.
- Brownish or olive green: lower in value, from stones with more iron.
Today’s main sources include the San Carlos reservation in Arizona, Pakistan (known for large, fine stones), China, Myanmar and Vietnam. Zabargad in the Red Sea, the ancient source mentioned above, is now largely historical.
How to choose a real peridot and spot imitations
- Look for doubling. Peridot has strong double refraction. Through the table with a loupe, the back facet edges often look doubled. Glass and most look-alikes don’t do this.
- Green glass is the common fake. Look for bubbles, swirls and a slightly “flat” colour.
- Synthetic spinel and green cubic zirconia are occasionally used in cheap jewellery. They don’t show peridot’s doubling.
- Peridot is rarely treated, so the colour you see is natural. Small inclusions shaped like lily pads are typical of the mineral.
- Russian sellers often use the name khrizolit (chrysolite) for peridot. It’s the same stone under a traditional name.
Peridot care, gifts and symbolism
At 6.5 to 7 on the Mohs scale, peridot is softer than many ring stones, so it can scratch and chip with rough wear. It’s also sensitive to acids and sudden temperature changes. Clean it only with warm soapy water and a soft brush, with no ultrasonic or steam cleaning. Take rings off for housework, gardening and the gym.
Gift ideas include earrings or a pendant for an August birthday, a delicate stacking ring for occasional wear or, for a collector, a slice of pallasite meteorite with peridot crystals. In the symbolic tradition peridot is a stone of light, warmth and a fresh start after a heavy period. August’s flower is the gladiolus. For a green crystal companion, see malachite.
Frequently asked questions
Is peridot the same as chrysolite?
In many languages, including Russian, “chrysolite” is a traditional name for peridot. Mineralogically both are gem olivine.
Is peridot hard enough for a ring?
It can be worn in a ring with care, but at 6.5 to 7 on the Mohs scale it scratches and chips more easily than sapphire or topaz. Pendants and earrings are safer for daily wear.
Does peridot come from space?
Most peridot is mined on Earth, but some pallasite meteorites contain peridot crystals. These are collector’s pieces, not typical jewellery stones.
What is August’s alternative birthstone?
Spinel was added to the August list in 2016 and sardonyx is the older traditional option, so August has three stones to choose from.