Why Does August Have Three Birthstones? Peridot, Spinel & Sardonyx Explained

Birthstone traditions have developed over time, so modern lists can include more than one gemstone for the same month. For August, peridot is the stone most people immediately recognise, while spinel and sardonyx offer alternative colours, styles and histories.

That means there is no single look an August birthstone piece has to follow. A gift can be bright and contemporary, deep and dramatic, or warm and understated depending on the stone chosen.

Peridot is known for its fresh yellow-green to olive-green colour. Its brightness makes it especially striking in clean, modern jewellery designs and it pairs beautifully with both warm and cool-toned metals.

For someone who wants a birthstone that is instantly recognisable as an August choice, peridot is usually the natural place to start.

Spinel occurs in a wide range of colours, including red, pink, purple, blue and darker tones. That variety makes it a useful August alternative for someone who loves colour but does not necessarily want green.

Because different spinel colours can create very different moods, it works equally well in delicate everyday jewellery and stronger statement designs.

Sardonyx is a layered variety of chalcedony traditionally recognised by bands of warm reddish-brown, orange, white and darker tones. Its natural pattern gives it a more organic character than a transparent faceted gemstone.

It is a particularly good choice for someone who prefers classic, vintage-inspired or less conventional jewellery.

As with all gemstone jewellery, gentle care is the safest approach. Store pieces separately, avoid harsh chemicals and remove jewellery before activities that could knock or scratch the stone. If you are unsure how to clean a particular piece, use a soft dry cloth and follow the care guidance supplied with the jewellery.