Why Does August Have 3 Birthstones: Explained

If you were born in August, you may have noticed something unusual when researching your birthstone. Unlike most months, which are tied to a single gemstone, August actually has three official birthstones: peridot, spinel, and sardonyx. For many people, this raises an obvious question. Why does August have 3 birthstones when other months only have one?

The answer involves centuries of gemstone history, changing traditions, and the way birthstone lists have evolved over time. In this guide, we will explain how August ended up with three birthstones, what makes each one unique, and how you can incorporate them into jewelry you will love wearing. If you want to explore gemstone jewelry inspired by these stones, our Stone Collection is a great place to start.

A Brief History of Birthstones

Before we get into why August specifically has multiple birthstones, it helps to understand where the birthstone tradition comes from in the first place. The concept of associating gemstones with specific months dates back thousands of years, with roots often traced to the Breastplate of Aaron described in the Bible, which featured twelve gemstones representing the twelve tribes of Israel.

Over time, various cultures developed their own birthstone traditions, and lists varied significantly depending on region, era, and available gemstones. It was not until the early 20th century that a more standardized list began to take shape in the United States, largely influenced by the jewelry industry itself.

In 1912, the National Association of Jewelers, now known as Jewelers of America, established an official birthstone list to bring more consistency to the tradition. This list has been updated several times since then as new gemstones were discovered, mining sources changed, and public taste evolved.

Why August Has Three Birthstones

August's list grew over time rather than being decided all at once, which is the main reason it now includes three stones instead of just one.

Peridot: The Traditional Choice

Peridot has long been recognized as August's primary birthstone, and it remains the most well known of the three. This vibrant green gemstone has been treasured for thousands of years, with historical records showing it was mined on the Egyptian island of Zabargad as far back as 1500 BCE. Ancient Egyptians referred to peridot as the gem of the sun, likely because of its bright, glowing green color.

Peridot's long history and consistent availability made it a natural fit for August from the earliest versions of the modern birthstone list, and it has remained the month's leading stone ever since.

Spinel: A More Recent Addition

Spinel was added to the official August birthstone list much later, in 2016, by the American Gem Trade Association. For centuries, spinel was often mistaken for other gemstones, particularly ruby, due to its similar red coloring and the fact that gem identification methods were far less precise in earlier eras. In fact, several famous gems once believed to be rubies, including some in royal collections, were later identified as spinel.

Spinel comes in a wide range of colors, including red, pink, blue, and purple, giving it much more visual variety than peridot. Its addition to the August list was partly an effort to modernize the birthstone system and highlight a gemstone that had long been overlooked despite its beauty and rarity.

Sardonyx: The Historical Alternative

Sardonyx is the third stone associated with August, and its inclusion comes from older birthstone traditions that predate the 1912 standardized list. Sardonyx is a banded gemstone, a variety of onyx that features alternating layers of sard, a reddish brown chalcedony, and white or cream colored onyx.

Historically, sardonyx was associated with courage and was often used by ancient Roman soldiers, who believed it offered protection in battle. While sardonyx is not as commonly used in modern jewelry as peridot or spinel, it remains part of the traditional birthstone lineage for August in several older lists that are still referenced today.

Why Some Months Have Multiple Birthstones

August is not alone in having more than one birthstone. Several other months, including June, October, and December, also have multiple stones associated with them. This pattern exists for a few key reasons.

Historical lists were combined. Different cultures and eras produced different birthstone lists, and rather than eliminating older traditions entirely, many were preserved alongside newer additions.

New gemstones were discovered or gained popularity. As mining techniques improved and gem identification became more accurate, previously misclassified stones like spinel were recognized as their own distinct gems worthy of inclusion.

The jewelry industry wanted more variety. Offering multiple birthstone options per month allows for greater flexibility in pricing, style, and availability, giving consumers more choices when selecting jewelry.

In short, August's three birthstones reflect a layering of tradition rather than a single decision made at one point in time.

Comparing Peridot, Spinel, and Sardonyx

While all three stones are associated with August, they differ significantly in appearance, history, and how commonly they are used in jewelry today.

Peridot is best known for its bright olive green to yellow green color, caused by iron within the mineral structure. It is widely available and relatively affordable compared to many other gemstones, making it a popular choice for everyday jewelry.

Spinel offers the widest range of colors among the three, though red and pink spinel tend to be the most sought after. High quality spinel can be quite valuable, particularly in rare colors, and its durability makes it an excellent choice for rings and other frequently worn pieces.

Sardonyx stands out visually due to its banded pattern, which makes each piece look distinct. It is less commonly used in fine jewelry today compared to peridot and spinel, but it remains a meaningful choice for those interested in more historical or symbolic birthstone options.

Which August Birthstone Should You Choose

If you are shopping for August birthstone jewelry, choosing between peridot, spinel, and sardonyx often comes down to personal style and budget.

Peridot is a great choice if you love bright, easily recognizable color and want something budget friendly. Spinel is ideal if you are drawn to rarity and want a stone with more color variety, particularly if you like the look of ruby or sapphire but want something a bit more unique. Sardonyx works well for those who appreciate historical symbolism and enjoy the distinctive banded pattern that sets it apart from typical gemstones.

There is no wrong choice among the three, since all are officially recognized birthstones for August. Many people simply choose the one that resonates with them visually or symbolically, rather than feeling obligated to pick the most traditional option.

Final Thoughts

So, why does August have 3 birthstones? The short answer is that the list grew over time, shaped by centuries of shifting tradition, evolving gemstone knowledge, and updates made by jewelry organizations looking to reflect a wider range of options. Peridot remains the classic choice, spinel offers modern rarity and versatility, and sardonyx connects wearers to a much older birthstone tradition.

Whichever stone speaks to you, all three offer a meaningful way to celebrate an August birthday through jewelry that carries centuries of history and symbolism.

Frequently Asked Questions

What is the main birthstone for August? Peridot is considered the primary and most widely recognized birthstone for August.

When was spinel added as an August birthstone? Spinel was officially added to the August birthstone list in 2016 by the American Gem Trade Association.

Is sardonyx still considered an August birthstone? Yes, sardonyx remains part of the traditional birthstone list for August, even though it is used less frequently in modern jewelry than peridot or spinel.

Can I choose any of the three August birthstones? Yes, all three stones, peridot, spinel, and sardonyx, are officially recognized birthstones for August, so you can choose whichever one you connect with most.