Sunstone is the traditional zodiac stone for Leo, covering 23 July to 22 August, and one of the most popular alternative birthstones for late summer. It is a feldspar with a glittering internal flash, warm orange through to red brown, worn in crystal practice for confidence, warmth and getting started on things.
Key takeaways
- Sunstone is the traditional stone for Leo, 23 July to 22 August, and appears on many alternative birthstone lists for that stretch of summer.
- The modern trade list carries peridot and spinel for August, so sunstone is the choice people make when they want the sign rather than the month.
- Sunstone is a feldspar, roughly 6 to 6.5 on the Mohs scale, and its glitter comes from tiny mineral platelets trapped inside the stone.
- Oregon sunstone is the copper bearing variety and became the state gemstone in 1987.
- Its close relative moonstone is the June birthstone, which is why the two are so often worn together as a sun and moon pair.
- Everything said here about energy, mood and intention is traditional belief, not medical fact.
What kind of birthstone is sunstone?
An alternative one, tied to the sign rather than the calendar month. Sunstone is the stone most often given for Leo, 23 July to 22 August, and it turns up across late summer birthstone lists. The modern trade list, standardised by American jewellers in 1912, carries peridot and spinel for August.
That 1912 list has a paper trail, which is why it gets quoted so often. It has been extended twice since. Tanzanite joined December in 2002 and spinel joined August in 2016, both by formal announcement. Zodiac and alternative lists sit alongside it as the older and more flexible tradition, shaped by astrologers and jewellers rather than by trade committees.
Both traditions are in daily use, and plenty of people wear one stone from each. If you want the month by month picture with the classic stones and the alternatives side by side, our birthstones by month guide lays it all out. Sunstone sits in the late summer section, which is where most people meet it first.
Which zodiac sign is sunstone linked to?
Leo, covering 23 July to 22 August, is the association you will meet most often. The reasoning is thematic. Leo is ruled by the sun in Western astrology, and sunstone is named for its warm, sunlit flash. A few lists also attach it to Libra or Sagittarius.
Zodiac stone tables vary a little between publishers, and that variation is part of the tradition rather than a flaw in it. The assignments have been refined over generations of practice, which is why one guide gives Leo a sunstone and the next gives it carnelian or ruby. Read a few, then choose the stone you actually want on your wrist.
Sunstone earns its Leo place easily. The colour is solar, the flash is theatrical, and the qualities traditionally attached to it, confidence, warmth and generosity, are the ones astrologers hand the sign anyway. For the classic calendar stones of the same season, our August birthstone guide covers peridot, spinel and sardonyx in detail.
What is sunstone, mineralogically?
Sunstone is a feldspar, the most abundant mineral group in the Earth's crust. Feldspars are aluminium silicates, and geological surveys put them at a large share of all crustal rock. Sunstone is the trade name for feldspar that shows aventurescence, the glittery internal sparkle that gives the stone its name.
That sparkle comes from countless flat mineral platelets suspended inside the stone, catching the light as you tilt it. In most sunstone the platelets are iron oxides such as hematite or goethite, which is where the familiar orange to red brown body colour comes from. Oregon material is different. Its platelets are metallic copper, it can show red and green tones that other sunstone cannot, and Oregon named it the state gemstone in 1987.
Sunstone belongs to the ornamental feldspars alongside moonstone, labradorite and amazonite. They share a family, a similar hardness and one structural quirk worth knowing about. Feldspar has two good cleavage directions, so a sharp knock can split it cleanly rather than simply chip an edge. That is a storage and setting point rather than a reason to worry about the stone.
How does sunstone compare with the other late summer stones?
It sits in the same family as moonstone, shares its hardness and costs a fraction of fine peridot. The table below puts the four stones people usually weigh up for a summer birthday side by side, with the birthstone role each one plays.
| Stone | Mineral family | Mohs hardness | Birthstone role |
|---|---|---|---|
| Sunstone | Feldspar | 6 to 6.5 | Zodiac stone for Leo, alternative late summer |
| Moonstone | Feldspar | 6 to 6.5 | June, with pearl and alexandrite |
| Peridot | Olivine | 6.5 to 7 | August, with spinel and sardonyx |
| Citrine | Quartz | 7 | November, with topaz |
Read down that table and the family resemblance is obvious. Sunstone sits beside stones people already know, shares their look and roughly their durability, and gets picked up in the same breath. Naming it as the Leo stone is the description that helps a buyer most, because it says exactly why it belongs to this stretch of the year.
Is sunstone a good gift for a July or August birthday?
Yes, and it is one of the easiest gifts to explain. Given as the Leo stone it lands for anyone born between 23 July and 22 August, which covers most of both months. Peridot and spinel are the calendar stones for August if you would rather give the month.
Gift buyers usually want two things at once: something that looks like the recipient, and something with a story attached. Sunstone gives you both. The colour reads warm and summery, and the Leo link gives you something true to say when the box is opened. Pairing works nicely too. A peridot pendant alongside a sunstone bracelet covers the sign and the month together.
Price is on your side. Common feldspar sunstone from India and Tanzania is inexpensive, so a bracelet or a pair of earrings costs a fraction of what fine peridot would. Oregon copper bearing sunstone with strong colour is the exception, and good examples of it are collectable in their own right.
How do you wear sunstone?
Bracelets and pendants suit it best. At 6 to 6.5 on the Mohs scale sunstone is a little softer than quartz, and its cleavage makes rings the riskier format because hands take the most knocks. In traditional practice sunstone is placed at the sacral and solar plexus, which is why it is so often strung as a wrist piece.
- Bracelet. The most forgiving option and the easiest to wear daily. Beaded strands sit flat and take less abuse than a raised setting.
- Pendant. Keeps the stone away from hard surfaces entirely, and shows the aventurescence beautifully in daylight.
- Ring. Lovely for occasional wear in a protective bezel. Better kept for evenings than for everyday.
- Loose tumble. Useful on a desk or in a pocket if you want the stone as a reminder rather than as jewellery.
In crystal practice sunstone is reached for around confidence, warmth and starting things that have been sitting untouched, which is why Solacely strings it with carnelian or citrine rather than with cooler stones. Placement is covered properly in our sunstone chakra guide, and the classic sun and moon pairing in sunstone and moonstone.
How do you care for sunstone?
Warm water, a drop of mild soap and a soft cloth is all it needs. Skip ultrasonic and steam cleaners entirely, because feldspar cleavage and sudden heat are a bad combination. Store sunstone away from quartz and harder stones, and put jewellery on after perfume and hairspray have dried.
Long stretches in strong sunlight are best avoided as a general rule for coloured stones, even though sunstone's colour is comparatively stable. If you cleanse pieces energetically, moonlight, sound or a rest on selenite are all kinder than salt water, which works its way into settings and dulls polish over time.
Handled sensibly, a sunstone bracelet holds its flash for years. What ends one is almost never fading. It is a hard knock against a doorframe or a drop onto tile. For the wider picture of the stone's traditional meanings and uses, see our sunstone crystal meaning, properties and benefits guide.
The properties described here reflect traditional and cultural belief around crystals. They are not medical claims and are not a substitute for professional healthcare. If you are managing a health concern, speak to a qualified practitioner.
Sources
Written by Chetena Sharma. Reviewed by the Solacely editorial team.
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About the author
Written by Chetna Sharma, crystal healing practitioner and co-founder of Solacely. Chetna has worked with healing crystals for over a decade and curates Solacely's protective stone collection.
