Aries Birthstone: Diamond
The Aries birthstone is Diamond — the gemstone of the fire sign ruled by Mars.
Dates
Mar 21 – Apr 19
Birthstone
Diamond
Element
Fire
Ruling Planet
Mars
Aries and the Diamond
Aries is the first sign of the zodiac, the spark that starts the whole wheel turning, and its birthstone is the hardest substance on Earth. The diamond mirrors the ram perfectly: brilliant, unbreakable, and impossible to ignore. Where the old traditions favour bloodstone, the warrior's talisman, modern astrology hands fiery Aries the diamond as a symbol of unstoppable will.
Why Diamond suits Aries
The diamond suits Aries because both are forged under pressure and refuse to yield. Rated 10 on the Mohs scale, a diamond cannot be scratched by anything but another diamond, which is more or less how Aries approaches life. Its clear, white fire reflects the ram's honesty and drive, while bloodstone — the older Aries stone — speaks to the sign's warrior streak, long carried by Roman soldiers for courage and protection.
Aries traits the Diamond reflects
The Aries personality
As a cardinal fire sign ruled by Mars, Aries is known for being bold, energetic, pioneering and competitive. Fire signs lead with passion, energy and a drive to act. A birthstone for Aries works best when it speaks to those qualities — which is exactly what Diamond does.
That is also why Aries carries supporting stones alongside Diamond. Where the primary stone captures the sign's headline character, the supporting stones round out the rest of its nature.
Aries supporting stones
Alongside Diamond, these stones are traditionally linked to Aries and make thoughtful companions or alternatives.
Bloodstone
The classical talisman of the warrior, said to steady courage and stop bleeding on the battlefield — a fitting match for Aries the soldier.
Jasper
A grounding stone that tempers the ram's impulsiveness with a little patience and staying power.
How to wear or gift the Aries birthstone
Aries lives at the hands and the head, so a diamond ring or stud earrings keep the stone where the ram is most active. Because diamonds are so durable, they are ideal for an everyday piece that can keep up with an Aries lifestyle. For a meaningful gift, pair a small diamond with a bloodstone or red jasper accent to honour both the modern and classical Aries stones.
Your monthly birthstone too
Because Aries runs from Mar 21 – Apr 19, it crosses two calendar months — each with its own monthly birthstone. Depending on the exact day you were born, your monthly stone may differ from your zodiac stone. Here are the month pillars that Aries overlaps:
Go deeper on the Diamond
Read more about Aries's stones in these in-depth guides: