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If you are wondering what is the most expensive birthstone, there is no single gemstone that is always the most valuable.
In general, diamond, ruby, emerald, sapphire, and alexandrite are among the birthstones most often associated with the higher end of the gemstone market. However, gemstone prices depend on quality, color, clarity, carat weight, origin, treatment, rarity, and market demand.
So, which birthstone is the most expensive? Diamond is commonly associated with the highest-value end of the birthstone market, but an exceptional natural ruby or alexandrite can sell for more per carat than an ordinary diamond.
If you are searching for the most expensive gemstone in general, the comparison is broader because many valuable gemstones are not birthstones. This article focuses specifically on gemstones recognized as birthstones.
If you are comparing birthstones by month before looking at price, our birthstones by month guide covers the commonly recognized stones, colors, and month-by-month options.
What Is the Most Expensive Birthstone?
The birthstones most commonly associated with the higher end of the gemstone market are:
| Birthstone | Month | Main Factors Affecting Value |
|---|---|---|
| Diamond | April | Color, cut, clarity, carat weight |
| Ruby | July | Color, origin, clarity, treatment |
| Emerald | May | Color, clarity, origin, treatment |
| Sapphire | September | Color, origin, treatment, size |
| Alexandrite | June | Color change, rarity, clarity, size |
There is no universal price ranking because quality can vary enormously within the same gemstone type.
For example, a fine untreated ruby can be worth considerably more per carat than a commercial-quality diamond. Similarly, natural alexandrite with a strong color change can command an exceptional price because fine material is extremely rare.
This is why birthstones ranked by price should be treated as a general comparison rather than a permanent market ranking.
Most Expensive Birthstones in Order
If you are looking for the most expensive birthstones in order, a general comparison of birthstones commonly found at the higher end of the market includes:
- Diamond — April
- Ruby — July
- Emerald — May
- Sapphire — September
- Alexandrite — June
This is a broad comparison rather than a fixed market ranking. The value of an individual stone can change significantly depending on its quality and characteristics.
Diamond — April Birthstone
Diamond is commonly considered the most expensive birthstone overall, particularly when comparing high-quality stones with strong market demand.
Diamond value is traditionally evaluated using the 4Cs:
- Color
- Clarity
- Cut
- Carat weight
A well-cut diamond with desirable color and clarity can command a substantial premium, especially as carat weight increases.
However, saying that diamond is always the most valuable birthstone would be misleading. Exceptional natural colored gemstones can exceed the price per carat of many diamonds.
Ruby — July Birthstone
Ruby is one of the most valuable colored gemstones and is the July birthstone.
Its value is strongly influenced by color. Vivid, highly desirable red rubies with good transparency and strong quality can command very high prices.
Origin and treatment can also make a significant difference. Fine untreated rubies from historically important sources can attract particularly strong collector demand.
This is why the question “is ruby the most expensive birthstone?” does not have a simple yes-or-no answer. An exceptional ruby can be more expensive per carat than an ordinary diamond.
Ruby value is strongly influenced by color, clarity, treatment, and other quality factors, as discussed in the GIA ruby buying guide.
Emerald — May Birthstone
Emerald is May’s birthstone and is valued primarily for its distinctive green color.
For emeralds, color and transparency are particularly important. Natural inclusions are common and are often referred to as the gemstone’s “jardin.” Their presence does not automatically mean an emerald is low quality.
Fine emeralds with attractive color, good transparency, desirable origin, and limited treatment can command significant prices.
Colombian emeralds are particularly well known in the international gemstone market, although origin alone does not determine value.
Sapphire — September Birthstone
Sapphire is September’s birthstone and is most commonly associated with blue.
The value of a sapphire depends on factors including:
- Color
- Saturation
- Tone
- Clarity
- Origin
- Treatment
- Carat weight
Fine blue sapphires with strong color and desirable characteristics can reach very high values.
Sapphire also has excellent durability, with a Mohs hardness of 9, making it suitable for rings and other jewelry intended for frequent wear.
Alexandrite— June Birthstone
Alexandrite is one of the most unusual and rare birthstones.
Its most recognizable characteristic is its color-changing effect. Natural alexandrite may appear green or bluish-green in daylight and shift toward reddish or purplish tones under incandescent lighting.
A strong and attractive color change is one of the most important factors affecting its value.
Fine natural alexandrite with strong color change, good clarity, larger size, and desirable origin can be extremely valuable.
This also explains why alexandrite is often considered one of the rarest birthstones, even though it is not necessarily the most expensive birthstone in every market comparison.
What Are the 3 Most Expensive Birthstones?
If you are specifically asking what are the 3 most expensive birthstones, diamond, ruby, and emerald are commonly included among the higher-value birthstones.
However, this should not be interpreted as a fixed ranking.
An exceptional ruby or emerald can be worth more per carat than a lower-quality diamond. Fine alexandrite can also command exceptionally high prices because high-quality natural material is rare.
Therefore, the most valuable birthstone depends on the individual stone rather than its birth month alone.
What Is the Rarest Birthstone?
Alexandrite is often considered one of the rarest birthstones, particularly when referring to natural, gem-quality material with a strong color-changing effect.
Rarity and price are related but are not the same thing.
- Price reflects what the market is willing to pay for a particular gemstone.
- Rarity describes how difficult it is to find material meeting specific quality requirements.
A gemstone can be extremely rare but have limited commercial demand. Conversely, a more available gemstone can command high prices when quality and demand are strong.
June is also unusual because its recognized birthstones include alexandrite, pearl, and moonstone.
What Are the 3 Rarest Birthstones?
There is no universally accepted list of the three rarest birthstones, because rarity depends on the specific quality and type of material being considered.
Natural alexandrite with a strong color change is frequently discussed among the rarest. Exceptional ruby, emerald, and sapphire can also be extremely scarce when specific combinations of color, clarity, origin, size, and treatment are required.
This is why rarest birthstones should not automatically be treated as the same list as the most expensive birthstones.
What Determines a Birthstone's Price?
The price of a birthstone is determined by several factors.
01
Color
For many colored gemstones, color is one of the most important value factors. The ideal color depends on the gemstone. For example, ruby is generally associated with vivid red, while emerald is prized for attractive green and sapphire is strongly associated with desirable blue.
02
Clarity
Clarity can affect value, but the importance of inclusions varies by gemstone. For example, emeralds commonly contain natural inclusions, while clarity expectations are different for diamonds.
03
Cut
A good cut can improve brilliance, color appearance, light return, and overall visual appeal.
04
Carat Weight
Larger gemstones are often more expensive, but price does not increase at a simple rate. For rare gemstones, larger stones of exceptional quality can become disproportionately more valuable because large, high-quality material is much harder to find.
05
Origin
Origin can influence gemstone value when a particular source has a strong reputation for producing desirable material. However, origin should not be treated as a guarantee of quality.
06
Treatment
Many gemstones are routinely treated to improve color, clarity, or appearance. Untreated natural gemstones can command premiums when their quality is exceptional, but the effect of treatment on value depends on the gemstone and the specific treatment.
07
Natural vs. Laboratory-Grown
Natural and laboratory-grown gemstones can have similar chemical and physical characteristics, depending on the gemstone, but their origins and market values are different. Natural gemstones are limited by geological supply, while laboratory-grown stones can provide more predictable availability and pricing.
For jewelry brands developing birthstone collections, this distinction can have a significant effect on product positioning and production costs.
VALUE GUIDE
Birthstone Prices: Why a Simple Ranking Can Be Misleading
Searches such as “birthstone prices,” “birthstones ranked by value,” “birthstones most expensive to least expensive,” and “top 12 most expensive birthstones” suggest that buyers often want a simple price list.
!
The problem is that gemstone pricing does not work like a fixed product catalog.
A more useful way to think about birthstone value is:
01 Gemstone type
→
02 Quality
→
03 Size
→
04 Origin
→
05 Treatment
→
06 Rarity
→
07 Market demand
This means a high-quality ruby can outperform a low-quality diamond, while an exceptional tourmaline can be worth considerably more than an ordinary tourmaline.
The gemstone name establishes the category, but the individual stone determines much of the final value. If you want to look beyond traditional birthstones, our guide to rare gemstones covers other exceptionally scarce and valuable gems.
What Is the Cheapest Birthstone?
If you are looking for the cheapest birthstone, commonly affordable choices include:
- Citrine — November
- Amethyst — February
- Blue Topaz — December
- Some varieties of Tourmaline — October
However, there is no single gemstone that is always the cheapest.
Price still depends on color, clarity, size, treatment, origin, and whether the gemstone is natural or laboratory-grown.
For example, a fine and unusual variety of a normally affordable gemstone can be considerably more expensive than a commercial-quality stone of the same type.
Most Expensive Birthstone vs. Rarest Birthstone
These terms are often used interchangeably, but they describe different things.
| Question | What It Measures |
|---|---|
| Most expensive birthstone | Market value |
| Most valuable birthstone | Overall monetary value |
| Rarest birthstone | Availability of desirable material |
| Cheapest birthstone | Lower typical market price |
| Birthstones ranked by price | Relative market comparison |
For example, alexandrite is often described as one of the rarest birthstones, while diamond is commonly considered one of the most expensive birthstones overall.
Neither statement creates a permanent ranking because gemstone prices change according to quality and market conditions.
Choosing Birthstone Jewelry
For individual jewelry buyers, how to choose the best and right birthstone jewelry depends on personal preference, budget, appearance, and intended use.
For jewelry brands, there are additional considerations:
- gemstone availability
- target price
- metal selection
- stone size
- setting design
- production requirements
- natural vs. laboratory-grown gemstones
- expected order quantity
For example, a premium birthstone collection may focus on diamond, ruby, emerald, sapphire, and fine alexandrite, while a more accessible collection could use amethyst, citrine, topaz, aquamarine, or other gemstones.
The gemstone should also match the jewelry type. Rings exposed to frequent impact generally require greater attention to gemstone durability and setting security than pendants or earrings.
Birthstone Jewelry for Jewelry Brands
For jewelry brands developing a personalized birthstone collection, gemstone selection is only one part of the custom jewelry process.
The manufacturer may also need to coordinate:
- gemstone sourcing
- stone size and shape
- metal selection
- CAD development
- stone setting
- polishing
- plating
- quality control
- packaging
A manufacturer with gemstone sourcing and custom production capabilities can help brands develop a consistent collection across multiple birth months.
At EndlessJewel, we are an OEM and ODM manufacturer to support custom birthstone jewelry in 925 sterling silver, gold, vermeil and solid gold, with setting gemstone. Whether you are developing a single personalized birthstone necklace or a complete 12-month collection, the production specification can be adapted to the design, gemstone, metal, and target market.
Conclusion
So, what is the most expensive birthstone? Diamond is commonly considered the most expensive birthstone overall, but there is no universal fixed ranking.
Among the birthstones most often found at the higher end of the market are: Diamond, ruby, emerald, sapphire, and alexandrite.
Ruby, emerald, sapphire, or alexandrite can sometimes exceed the price per carat of an ordinary diamond when the gemstone has exceptional color, rarity, origin, clarity, size, and treatment characteristics.
If the question is “what is the rarest birthstone?”, fine natural alexandrite is often considered one of the strongest candidates because high-quality material with a strong color change is exceptionally difficult to find.
Ultimately, birthstone value depends on the individual gemstone rather than the birth month alone.
Frequently Asked Questions
1. What are the most expensive birthstones?
The most expensive birthstones commonly include diamond, ruby, emerald, sapphire, and fine alexandrite. Diamond is often considered the most expensive birthstone overall, but exceptional ruby or alexandrite can exceed the price per carat of lower-quality diamonds.
2. What are the 3 most expensive birthstones?
Diamond, ruby, and emerald are commonly included among the three most expensive birthstones. However, there is no universal ranking because gemstone prices vary according to quality, size, origin, treatment, and rarity.
3. Which month has the most expensive birthstone?
April is commonly associated with the most expensive birthstone because its birthstone is diamond. However, July’s ruby, May’s emerald, September’s sapphire, and June’s alexandrite can also reach very high values when the gemstones are exceptional quality.
4. What is the cheapest birthstone?
Citrine, amethyst, and blue topaz are generally among the more affordable birthstones. Their prices can still vary significantly depending on color, clarity, size, treatment, origin, and quality.
5. Is ruby the most expensive birthstone?
Ruby can be one of the most expensive birthstones, particularly when it has exceptional color, clarity, size, origin, and limited treatment. However, ruby is not universally the most expensive because gemstone value varies from stone to stone.
Samuel
With 15+ years of hands-on experience, Samuel specializes in jewelry materials, plating, gemstones, production, and quality control, sharing practical insights from real-world manufacturing.
