July Birthstone

Explore July's birthstone: the ruby — one of the most prized gemstones in the world — plus carnelian as a traditional alternative, with history, meanings, care tips, and gift ideas.

Ruby

Primary

Corundum — Al₂O₃ (chromium-bearing)

Ruby is the red variety of corundum, an aluminum oxide mineral. Its vivid crimson color comes from trace amounts of chromium in the crystal lattice. At Mohs 9, ruby is the second hardest natural gemstone after diamond. The word "ruby" derives from the Latin rubeus, meaning red. Rubies from Myanmar's Mogok Valley — known for their pure "pigeon's blood" red and strong fluorescence — are the most coveted in the world and command prices that can exceed diamonds of equivalent weight.

Hardness 9 / 10
Color Red to pinkish-red

Carnelian

Alternative

Chalcedony — SiO₂ (iron oxide-bearing)

Carnelian is a reddish-orange to brownish-red variety of chalcedony (microcrystalline quartz). Its warm color is caused by iron oxide impurities within the silica matrix. With a Mohs hardness of 6.5–7, it is durable enough for everyday jewelry. Carnelian has been prized since antiquity for seals, amulets, and intaglio carvings. It is widely available and significantly more affordable than ruby, making it a practical alternative for July birthstone gifts.

Hardness 6.5 – 7 / 10
Color Orange-red to brownish-red

Ruby — Key Facts

Mineral Family
Corundum (Al₂O₃)
Ruby is a variety of corundum — the same mineral as sapphire. The only difference is color: chromium produces red (ruby), while other trace elements (iron, titanium) create blues, yellows, pinks, and greens classified as sapphire.
Color Range
Pinkish-red to deep crimson
Ruby color ranges from pinkish-red to deep blood-red depending on chromium concentration. The most prized shade is "pigeon's blood" — a vivid, pure red with a slight bluish overtone. Stones too light in tone are classified as pink sapphire rather than ruby.
Mohs Hardness
9 / 10
At Mohs 9, ruby is the second hardest natural mineral after diamond. Only diamond can scratch a ruby. This exceptional hardness makes ruby one of the most durable gemstones for rings and other everyday jewelry.
Fluorescence
Strong red (UV)
One of ruby's most distinctive features is its strong red fluorescence under ultraviolet light. Chromium not only colors the stone red but also causes it to glow from within, giving top-quality rubies from Myanmar a vivid, fiery appearance in sunlight (which contains UV).
Primary Sources
Myanmar, Mozambique, Thailand, Sri Lanka
Myanmar's Mogok Valley has been the world's most celebrated ruby source for over 800 years. Mozambique's Montepuez deposit, discovered in 2009, is now the largest producer by volume. Other sources include Thailand, Sri Lanka, Madagascar, Tanzania, and Vietnam.
Birthstone Since
1912 (modern list)
Ruby was officially designated the July birthstone in 1912 by the American National Retail Jewelers Association. It is also the traditional gift for 40th wedding anniversaries, and the modern list recommends it for 15th and 40th anniversaries.

Carnelian — Key Facts

Mineral Family
Chalcedony (Quartz group)
Carnelian is a microcrystalline variety of quartz (SiO₂). It belongs to the chalcedony family, which also includes agate, jasper, onyx, and bloodstone. The fine-grained crystal structure gives carnelian a smooth, waxy luster when polished.
Color
Orange-red to brownish-red
Carnelian ranges from pale orange to deep reddish-brown. The saturation and depth of color depend on the concentration of iron oxide (hematite) within the silica. Stones with a clear, evenly distributed reddish-orange are considered the finest quality.
Mohs Hardness
6.5 – 7 / 10
Carnelian's Mohs hardness of 6.5–7 makes it suitable for pendants, earrings, and bracelets. For rings worn daily, a protective bezel setting is recommended to minimize surface abrasion from dust (which contains quartz particles of similar hardness).
Luster
Waxy to vitreous
When polished, carnelian displays a characteristic waxy to vitreous (glassy) luster. It is semi-translucent in thin sections, allowing light to glow softly through the stone — a quality prized in ancient carved intaglios and cameos.
Primary Sources
India, Brazil, Uruguay, Madagascar
India (particularly Rajasthan and Gujarat) is the leading producer of carnelian. Brazil and Uruguay supply large quantities through their agate-mining regions. Madagascar, South Africa, and Siberia are also notable sources. Much commercial carnelian is heat-treated to intensify color.
Value vs. Ruby
Substantially more affordable
Carnelian is one of the most affordable colored gemstones — typically a few dollars per carat for standard quality. Fine rubies of 1 carat or more can cost thousands to tens of thousands per carat. Carnelian offers the warm red-orange color family at a fraction of the price.

Mohs Hardness Comparison

How ruby and carnelian rank against common gemstones on the Mohs scale.

Diamond
10
Ruby (July)
9
White Topaz
8
Aquamarine (Beryl)
7.75
Carnelian (July alt.)
7
Feldspar / Moonstone
6
Glass
5.5
Apatite
5

The Mohs scale is ordinal — equal steps do not represent equal differences in absolute hardness. Diamond is approximately 4× harder than corundum (Mohs 9) in absolute terms.

History & Symbolism

Ruby

Ancient India and Southeast Asia
The oldest recorded ruby mines are in Myanmar's Mogok Valley, active since at least the 6th century AD. Ancient Sanskrit texts called ruby "ratnaraj" — the king of gems. Warriors embedded rubies beneath their skin, believing the stone would make them invincible and protect them from harm. The Chinese also used rubies to decorate armor and swords as early as 200 BC.
Ancient Greece and Rome
The ancient Greeks and Romans prized rubies as a symbol of power and wealth. They believed rubies contained an eternal inner flame that could not be extinguished — even boiling water was said to have no effect. Roman soldiers wore rubies for protection in battle.
Medieval Europe
Medieval Europeans considered the ruby the most precious of all gems. It was thought to bring health, wealth, wisdom, and success in love. Kings set rubies in their crowns and rings as symbols of sovereignty and divine favor. Rubies were prescribed in powdered form as a remedy for illness — a practice that, like many gem therapies of the era, had no medicinal effect.
Mughal India
Mughal emperors were among the greatest collectors of rubies in history. The Mughal court commissioned elaborate ruby-encrusted jewelry, thrones, and weapons. Many historic rubies, including spinels previously misidentified as rubies, passed through Mughal hands and now reside in European crown jewels.
Modern Era and the 4Cs
Ruby's value today is assessed using the same 4Cs framework as diamond — Color, Clarity, Cut, and Carat — with color being the most important factor for ruby. The GIA began issuing ruby reports certifying origin and treatment status. "Pigeon's blood" from Myanmar and exceptional untreated stones regularly set auction records, with some stones exceeding $1 million per carat.

Carnelian

Ancient Egypt and Mesopotamia
Carnelian is one of the oldest gemstones used by humans. Ancient Egyptians called it "the setting sun" and incorporated it extensively in jewelry, amulets, and funerary objects. Carnelian beads have been found in Mesopotamian burial sites dating to 4500 BC. The Egyptian Book of the Dead names carnelian as a protective stone for the dead.
Ancient Rome
Romans engraved carnelian into intaglio seals and signet rings because hot wax does not stick to carnelian — making it the ideal material for personal seals. These seals were used to authenticate important documents and letters. The Roman general and consul Marcus Aurelius reportedly wore a carnelian engraved with his seal.
Islamic Tradition
Carnelian holds special significance in Islamic tradition. It is said that the Prophet Muhammad wore a carnelian ring set in silver on his right hand. Many Islamic scholars and leaders followed this tradition. The stone is associated with blessings, courage, and protection, and continues to be widely worn in the Muslim world today.
Modern Role
Today carnelian is primarily used as a decorative and semi-precious gemstone in beaded jewelry, carved figures, and cabochon settings. Its warm, earthy tones complement both silver and gold metalwork. It is widely used in crystal healing communities as a stone of creativity, motivation, and courage, though these properties have no scientific basis.

Care Tips

Ruby

Clean with warm soapy water
Use a soft-bristle brush, mild soap, and warm water to clean rubies. Rinse thoroughly and pat dry. For untreated or heat-only-treated rubies, ultrasonic and steam cleaners are generally safe.
Avoid ultrasonic cleaning for treated stones
Many rubies on the market are fracture-filled with glass or lead glass to improve clarity. These treated stones can be damaged by ultrasonic vibrations and sudden heat changes. Always ask about treatment status before cleaning with machine methods.
Protect from sharp impacts
While very hard, ruby can fracture along natural inclusions or cleavage directions if struck sharply at the right angle. Remove ruby rings when doing heavy manual work or activities that risk hard impacts.
Store separately from other gems
Ruby can scratch most gemstones (only diamond is harder). Store in individual pouches or compartments to prevent contact with softer stones such as emerald, opal, pearl, or tourmaline.

Carnelian

Use mild soap and water
Carnelian cleans easily with warm water, a drop of mild dish soap, and a soft cloth. Rinse well and dry with a lint-free cloth. Avoid harsh detergents or abrasive cleaners that can dull the polished surface.
Avoid prolonged sun exposure
Extended exposure to direct sunlight can gradually fade carnelian's color over years. Store your carnelian jewelry away from windowsills and strong artificial UV sources when not wearing it.
Skip ultrasonic cleaners
Carnelian may contain natural inclusions or micro-fractures. Ultrasonic vibrations can widen these fractures over time. Hand cleaning is always the safest option for chalcedony-group stones.
Store away from harder gems
Carnelian (Mohs 6.5–7) can be scratched by corundum (ruby, sapphire), topaz, quartz, and diamond. Keep in a separate soft pouch or fabric-lined compartment when storing alongside other jewelry.

Gift Ideas for July Birthdays

Ruby Solitaire Ring Ruby
An oval or cushion-cut ruby in a yellow or rose gold prong setting is a timeless and deeply personal July birthstone gift. Opt for heat-only treatment and a GIA certificate for maximum value.
Ruby Stud Earrings Ruby
A pair of matched round or oval rubies in simple bezel or prong studs is a wearable everyday gift that suits all ages and styles. Lab-grown rubies offer excellent color at a lower price point.
Ruby and Diamond Pendant Ruby
A ruby center stone surrounded by a diamond halo on a gold or platinum chain combines the passion of ruby with the brilliance of diamonds — ideal for milestone birthdays and anniversaries.
Carnelian Beaded Bracelet Carnelian
A hand-knotted bracelet of polished carnelian beads in sterling silver or gold-filled settings is a warm, earthy, and affordable gift — suitable for casual everyday wear.
Carnelian Cabochon Ring Carnelian
A large oval or round carnelian cabochon in a bold bezel setting delivers striking color impact at minimal cost. Pairs beautifully with both yellow gold and oxidized silver.
Ruby Birthstone Charm Both
A July birthstone charm featuring ruby or carnelian on a charm bracelet or necklace makes a personal and budget-friendly gift that can be layered with other birth month charms.

Birthstone by Month

Select any month to look up its birthstone.

Summary

Explore July's birthstone: the ruby — one of the most prized gemstones in the world — plus carnelian as a traditional alternative, with history, meanings, care tips, and gift ideas.

How it works

  1. July's primary birthstone is the ruby (recognized on the modern birthstone list since 1912).
  2. Carnelian is the most widely accepted traditional alternative birthstone for July.
  3. Browse the hero cards to compare ruby and carnelian side by side.
  4. Explore the Key Facts grids for mineral family, color, hardness, and origin details.
  5. Read the History and Symbolism section to understand the cultural legacy of each stone.
  6. Check Care Tips to keep your July birthstone jewelry in top condition.
  7. Use the Gift Ideas section to find the perfect July birthday present.
  8. Use the month selector at the bottom to look up birthstones for any other month.

Use cases

  • Find a meaningful birthstone gift for a July birthday.
  • Learn why ruby is considered one of the world's most valuable gemstones.
  • Understand the difference between ruby and carnelian before buying jewelry.
  • Discover the historical symbolism of rubies across ancient cultures.
  • Care for ruby or carnelian jewelry properly to maintain its beauty.
  • Explore affordable alternatives to ruby for July birthstone gifts.
  • Plan a July-themed birthstone jewelry collection.
  • Look up birthstones for any month using the interactive month selector.

Frequently Asked Questions

Last updated: 2026-06-10 · Reviewed by Nham Vu