Quick Answer
July's birthstone is ruby, a red variety of corundum colored by chromium. Nearly every ruby on the market is heat-treated to improve color and clarity, a routine and widely accepted practice. Ruby rates Mohs 9, just below diamond, making it one of the toughest gemstones for daily wear. Lab-created ruby shares the same chemistry as a mined stone.
What Is July's Birthstone, and What Does It Mean?
Ruby is a variety of corundum — the same mineral family as sapphire — colored red by trace chromium. It has symbolized passion, protection, and vitality across cultures for centuries, and it's one of the four traditional cardinal gems alongside diamond, sapphire, and emerald. At Mohs 9, it's exceptionally durable for rings worn every day.
- Ruby's red color comes from chromium impurities in the corundum crystal structure
- Sapphire is the same mineral (corundum) in any color other than red
- Fine ruby is graded on color saturation, clarity, and cut, much like diamond
- Origins historically prized include Myanmar (Burma), Thailand, and Mozambique
Why Are Most Rubies Heat-Treated?
Heat treatment is the industry-standard way to improve a ruby's color and clarity, and it's been used for centuries. The process heats the stone to high temperatures to dissolve silk inclusions and deepen red saturation. Reputable sellers disclose heat treatment; it's considered normal practice, not a defect, and it's priced into most commercial ruby.
- Heating dissolves fine “silk” inclusions and can deepen a stone's red
- Unheated rubies are rarer and typically cost more than heated stones of similar quality
- Heat treatment is permanent and does not need to be re-disclosed at resale
Is Lab-Created Ruby a Real Ruby?
Yes. Lab-created ruby has the exact same chemistry, hardness, and crystal structure as a mined ruby — it's grown in a lab instead of formed underground. It is not a simulant like moissanite or cubic zirconia, which only imitate ruby's look. Most lab-created ruby is made using flame-fusion or flux-growth methods, both established for over a century.
- Flame-fusion (Verneuil process) and flux-growth are the two most common lab-created ruby methods
- Lab-created ruby is significantly more affordable than natural ruby of comparable size and color
- Because it shares ruby's chemistry, lab-created ruby also rates Mohs 9
How Rare Is a Fine “Pigeon's Blood” Ruby?
“Pigeon's blood” describes the rarest, most saturated red rubies, historically associated with Myanmar's Mogok region. It's a trade term for top color, not a certification grade, and it applies to a small fraction of rubies on the market. Most commercial ruby jewelry uses good, well-cut stones well below that rarity tier — still genuinely red corundum, just more attainable.
- “Pigeon's blood” is a descriptive trade term, not an official grading category
- Color saturation, not size alone, drives how a ruby is valued
- Well-cut, moderately saturated ruby is the realistic option for most jewelry buyers
How to Wear a July Birthday Look in Sterling Silver and Moissanite
We don't currently stock ruby in our catalog, so we style July birthdays with near-colorless moissanite set in 925 sterling silver instead — a bright, everyday look, not a birthstone substitute. A pendant with warmth and shine makes a personal, giftable piece, and it pairs easily with whatever a July birthday person already wears.
- A halo pendant adds extra sparkle without needing an actual ruby to do it
- A nameplate or script necklace adds a personal touch a stock birthstone charm can't
- A heart pendant works well as a meaningful gift for a friend, sister, or partner
- If you want a real ruby accent, the custom route below is the honest way to add it
Here are a few everyday pieces from our current necklace lineup that work well for this kind of personal, giftable look:
Browse the full lineup in our necklaces collection, or see more budget-friendly gift ideas in our moissanite gifts under $100 guide.
Want an Actual Ruby Piece? We Can Make One
If you want a genuine ruby piece — a birthstone pendant, a personalized initial charm, or a memorial design — we take custom requests. Share your idea through our custom design inquiry page, and we'll work with you on stone, setting, and sterling silver details before anything is made.
This is where the personal side of a birthstone gift comes in. A July birthday piece doesn't have to be a plain solitaire — a small ruby accent set beside an initial, a number, or a hand-picked design for mom carries more meaning than a stock item, and it's also where memorial pieces most often start. If you're curious how other months in this series are covered, we've also written guides for May's emerald and August's peridot, spinel, and sardonyx.
Frequently Asked Questions
Is ruby a good stone for an everyday ring?
Yes. At Mohs 9, ruby is one of the hardest gemstones after diamond and moissanite, so it holds up well to daily knocks and normal wear. Like any gemstone, it can still chip from a hard direct hit, so it's worth avoiding rough contact during activities like sports or heavy manual work.
Does MYNSU sell ruby jewelry?
Not in our standard catalog — we currently stock moissanite and 925 sterling silver pieces, some with pavé cubic zirconia accents. If ruby is specifically what you're after, our custom design process can build a one-off piece around it; reach out through our custom design inquiry page to start that conversation.
Is lab-created ruby a real ruby?
Yes. Lab-created ruby has the same chemical structure and optical properties as natural ruby — it's grown in a lab rather than mined, and it isn't a simulant like moissanite or cubic zirconia. Because natural fine ruby is rare and expensive, most affordable ruby jewelry on the market today uses the lab-created version.
Why do jewelers disclose heat treatment on ruby?
Heat treatment changes a stone's appearance and is considered a material fact buyers should know before purchasing. Reputable jewelers and grading labs disclose it because undisclosed treatment can affect a stone's value and how it should be cared for. It's an industry-standard practice, not a sign of a lower-quality stone.
Every MYNSU order ships free within the US, backed by 30-day returns, and ships from our Irvine, California warehouse.