Diaspore prices in 2026 range from under $100 per carat for pale or weakly changing commercial stones to several thousand dollars per carat for large, vivid color-change gems. Good one- to three-carat Turkish Diaspore commonly falls between approximately $500 and $2,500 per carat.
The widest price differences come from color-change strength and size. Trademarked or premium-branded stones may carry higher suggested retail values, but buyers should still compare their actual appearance, documentation and current market alternatives.
Diaspore Price per Carat in 2026
The following ranges represent broad U.S. retail expectations for natural faceted Diaspore. They combine generic Turkish color-change material and premium-branded retail positions rather than treating one seller’s price table as a universal market standard.
| Diaspore quality | Typical characteristics | Approximate 2026 retail price |
|---|---|---|
| Entry commercial | Pale, weak change, visible inclusions or poor cutting | $70–$300 per carat |
| Good under 1 ct | Noticeable green-to-champagne or pink change, acceptable clarity | $300–$800 per carat |
| Fine 1–2 ct | Strong color change, eye-clean appearance and balanced cutting | $700–$1,800 per carat |
| Fine 2–5 ct | Rare size, strong pleochroism and distinct change under different lights | $1,500–$3,500 per carat |
| Premium 5–8 ct | Vivid change, high transparency and documented Turkish origin | $3,000–$6,000 per carat |
| Exceptional stones above 8 ct | Rare large gems with dramatic change and superior cutting | $5,000–$10,000+ per carat |
Trademark-holder suggested retail tables can be higher. A 2026 branded schedule placed strong color-change stones at approximately $750 per carat below one carat, rising through $2,400 per carat for two- to three-carat stones and $4,000 per carat for five- to eight-carat stones.
Actual transaction prices vary widely. Generic Diaspore, weakly changing material and poorly documented stones may sell far below premium-branded figures.
The broader relationship among rarity, size, appearance and demand appears in How Gemstone Prices Are Determined.
What Is Gem-Quality Diaspore?
Diaspore is an aluminum oxide hydroxide mineral. Most ordinary mineral material is not suitable for transparent jewelry, but rare crystals can be faceted.
The best-known gem material comes from Turkey and can show strong pleochroism and color change. Depending on lighting and crystal orientation, the same stone may appear kiwi green, olive, champagne, peach, pink or purplish red.
The completed Diaspore guide explains the mineral’s identity and broader properties. The completed Types of Diaspore page owns the material’s colors and trade varieties.
This page remains focused on cost and value.
Diaspore, Zultanite and Csarite
Zultanite is a trademarked commercial name associated with color-change Diaspore from Turkey. Csarite has also been used as a branded name for Turkish material.
The underlying mineral is Diaspore. A trademark may identify a particular marketing program, source relationship or quality structure, but it does not create a new mineral species.
The tracker therefore treats Zultanite as an alias that routes to the canonical Diaspore content rather than supporting a duplicate gemstone page.
A branded stone can cost more because of controlled distribution, documentation, warranties, presentation and marketing. Buyers should still judge whether the actual color change and cutting justify the premium.
Listings that describe every Diaspore as “Zultanite” may misuse the trademark or blur the distinction between branded and generic material.
Color Change Is the Primary Value Factor
Fine Diaspore should show a clear difference between cool and warm lighting. Common daylight appearances include green, yellowish green or olive, while incandescent light may produce champagne, pink, peach, raspberry or purplish tones.
A subtle shift from pale greenish yellow to pale champagne is less valuable than a distinct green-to-pink transformation.
Both sides of the change matter. A stone with an attractive green daylight color but muddy brown incandescent color will generally cost less than one with two appealing appearances.
The change should also be visible without extreme lighting or heavy photo editing. Sellers should show the gem under standardized cool and warm light sources.
Color-change grading is not as universally standardized as Diamond color. Consequently, direct video comparison is essential.
Pleochroism vs Color Change
Diaspore is strongly pleochroic, meaning it can show different colors when viewed along different crystal directions. It can also change appearance when the light source changes.
These effects are related visually but should not be confused. Rotating the stone under one light demonstrates pleochroism, while moving it between daylight-equivalent and incandescent light demonstrates color change.
A skilled cutter orients the rough to produce the most attractive face-up color and change. Poor orientation can leave the finished stone dominated by brown or weak yellow.
A listing that shows several colors from different angles under one light may be demonstrating pleochroism rather than a strong lighting-based change.
Size Creates Steep Price Premiums
Fine color-change Diaspore becomes progressively rarer above three carats. Large clean stones require sufficiently thick rough, favorable orientation and careful cutting around cleavage.
| Example stone | Approximate per-carat range | Approximate total price |
|---|---|---|
| 0.75 ct good commercial Diaspore | $300–$800 | $225–$600 |
| 1.25 ct fine Diaspore | $700–$1,800 | $875–$2,250 |
| 2.50 ct fine Diaspore | $1,500–$3,500 | $3,750–$8,750 |
| 5.00 ct premium color-change Diaspore | $3,000–$6,000 | $15,000–$30,000 |
| 10 ct exceptional documented stone | $5,000–$10,000+ | $50,000–$100,000+ |
The top examples assume a genuinely strong color change and premium retail context. A large pale or windowed stone may sell for only a fraction of those totals.
Very large asking prices should be supported by comparable stones, independent documentation and a return policy. Suggested retail schedules are not guaranteed resale values.
Clarity and Transparency
Fine faceted Diaspore is generally expected to appear eye-clean. The material may contain needles, fractures, clouds and other natural inclusions, but obvious defects reduce value.
Inclusions become more acceptable at rare large sizes. Even then, a surface-reaching fissure should be considered separately from a harmless internal feature.
Transparency is important because color change becomes more compelling when light travels cleanly through the stone. Cloudiness can weaken both brightness and color separation.
A high clarity grade alone does not create premium value. A clean stone with weak change may remain less desirable than a slightly included stone with dramatic colors.
Cut and Orientation
Diaspore presents a difficult cutting problem. Strong pleochroism rewards precise orientation, while perfect cleavage can cause the rough or finished stone to split along a structural plane.
Cutters must balance color, weight retention and durability. Losing too much rough can make a small stone unprofitable, while preserving too much depth can create windowing or a small face-up appearance.
Ovals, cushions, pears and emerald-style shapes are common. Elongated forms may follow the original crystal and help preserve weight.
The stone should show useful color across the center rather than restricting its best hue to one edge. A large transparent window lowers saturation and value.
Precision cutting can justify a premium when it improves both change and brilliance. A complicated design that creates excessive depth does not.
The practical inspection process belongs to the Diaspore Buying Guide.
Turkish Origin
Turkey’s İlbir Mountains are the best-known source of commercial color-change Diaspore. The deposit established the modern gemstone market and the Zultanite trade name.
Other localities produce Diaspore, but they may not provide the same combination of transparency, size and color-change behavior.
Origin can support value when it is documented, particularly for large premium stones. Nevertheless, “Turkish” by itself does not establish top quality.
A pale, poorly cut Turkish stone should not receive the same per-carat price as a vivid eye-clean gem from the same broad source.
Laboratories may be able to identify the mineral and evaluate treatment. A geographic-origin opinion depends on the available evidence and the laboratory’s service.
Treatment Status
Color-change Diaspore is generally marketed without routine enhancement. Its color behavior comes from trace elements and crystal structure rather than a standard heating or irradiation process.
However, sellers should still provide a treatment statement. “Naturally mined” does not independently guarantee that no enhancement, coating or repair occurred later.
Because premium prices often rely on untreated status, an expensive stone may justify laboratory verification.
The universal enhancement framework appears in Gemstone Treatments Explained.
Color-change glass, synthetic corundum and other manufactured materials can imitate parts of Diaspore’s appearance. A dramatic change combined with an implausibly low price should prompt further testing.
Diaspore vs Alexandrite Price
Alexandrite is the best-known color-change gemstone and generally occupies a much higher market tier. Fine natural Alexandrite can cost thousands to tens of thousands of dollars per carat.
Diaspore offers a different color palette, commonly shifting between green, champagne, peach and pink. It can provide a large color-change stone for less than an equivalent fine Alexandrite.
The separate Alexandrite Price Guide owns Alexandrite’s market. The completed Alexandrite guide provides its mineral and historical context.
Diaspore should not be priced by claiming that it is “rarer than Alexandrite” without considering market recognition, quality and demand. Geological scarcity alone does not determine retail value.
Diaspore vs Andalusite
Andalusite can show strong pleochroism, often combining green, brown, yellow and reddish colors. However, it does not normally present the same green-to-pink lighting change associated with fine Turkish Diaspore.
Andalusite is generally more affordable. Fine transparent material can still be valuable, especially when the cutter arranges its colors attractively.
The Andalusite Price Guide owns those price factors, while the completed Andalusite guide provides material context.
A seller should not use “color-changing” loosely when a stone only displays different directional colors.
Diaspore Jewelry Prices
| Jewelry type | Broad 2026 retail range | Main cost drivers |
|---|---|---|
| Small silver pendant or earrings | $300–$1,500 | Stone size, color change and silver |
| Gold pendant with 1–2 ct stone | $1,500–$6,000 | Diaspore quality, gold and accent gems |
| Gold ring with 1–3 ct stone | $2,000–$10,000 | Center stone, protective setting and labor |
| Fine 3–5 ct Diaspore ring | $7,000–$25,000+ | Color change, rarity and documentation |
| Branded large-stone jewelry | $15,000–$100,000+ | Stone size, brand, diamonds and design |
The setting may represent a large portion of the price. Branded jewelry can also carry substantial design and distribution premiums.
Diaspore’s cleavage makes protective design important. Bezel, halo and low-profile settings can reduce the chance of impact along an exposed edge.
The jeweler should understand the stone before resizing or repair work begins.
Durability and Condition
Diaspore has a Mohs hardness of approximately 6.5 to 7, but hardness does not describe its complete durability.
Perfect cleavage is the main concern. A sharp blow in an unfavorable direction can split the stone even when the surface resists ordinary scratches.
Existing chips, girdle abrasions and cleavage-reaching fractures reduce value. Corners and pointed ends should be inspected carefully.
Pendants and earrings expose the gem to less impact than daily-wear rings. A Diaspore ring can still be worn, but it benefits from protective mounting and careful habits.
Certification and Documentation
A laboratory report becomes more useful when a stone carries a premium brand name, large size, strong origin claim or high price.
The report should identify natural Diaspore and record measurements and weight. It may also state detected treatment and other relevant findings.
Trademark status is separate from mineral identification. A laboratory can confirm Diaspore but may not certify that a seller is authorized to use a particular commercial brand.
The Gemstone Certification Labs comparison explains report scope. How to Read a Gem Lab Report covers the individual fields.
Does Diaspore Hold Its Value?
Diaspore has a smaller secondary market than Diamond, ruby, sapphire, emerald or Alexandrite. That limited buyer base can make resale slow.
Large fine color-change stones may attract collectors, particularly when they have strong visual performance and respected documentation. However, branded suggested retail values should not be treated as guaranteed resale prices.
A secondhand buyer may discount the stone for testing costs, limited liquidity and the difficulty of finding a replacement customer.
The broad resale principles appear in Do Gemstones Hold Their Value?.
Price Guide vs Buying Guide
This page owns Diaspore’s price bands, size premiums and value factors. It does not replace the detailed lighting tests, cut inspection and seller questions assigned to the dedicated buying guide.
Online buyers should request videos under two clearly identified light sources and confirm whether the listing shows actual color change or only different camera angles.
The broader seller-verification process appears in How to Buy Gemstones Online Without Getting Scammed.
The Buying & Value hub connects price, certification, treatment and resale guidance.
Frequently Asked Questions
1. How much is Diaspore worth per carat in 2026?
Commercial material may cost $70 to $500 per carat, while fine color-change stones commonly range from $700 to $3,500. Large premium gems can exceed $5,000 per carat.
2. Is Zultanite the same as Diaspore?
Zultanite is a trademarked commercial name associated with Turkish color-change Diaspore. The underlying mineral is Diaspore.
3. What Diaspore color change is most valuable?
A distinct and attractive green-to-pink, raspberry or purplish change generally receives the highest premium.
4. Why is large Diaspore expensive?
Fine transparent rough becomes scarce at larger sizes, and cutters must preserve color orientation while working around perfect cleavage.
5. Does every Diaspore change color?
No. Many Diaspore crystals show weak color, ordinary pleochroism or no commercially important lighting-based change.
6. Is pleochroism the same as color change?
No. Pleochroism appears when the stone is viewed from different directions, while color change occurs under different light sources.
7. Is Diaspore normally treated?
Fine Turkish color-change material is generally marketed without routine enhancement, but buyers should still request explicit treatment disclosure.
8. How much is a two-carat Diaspore worth?
A fine two-carat stone may retail for approximately $1,500 to $3,500 per carat, depending on color change, clarity and cutting.
9. Is Diaspore more expensive than Alexandrite?
Usually not. Fine natural Alexandrite has a stronger collector market and commonly costs substantially more per carat.
10. Does Diaspore need a laboratory report?
A report is advisable for large or expensive stones, particularly when the price depends on natural origin, treatment status or a premium trade name.
11. Is Diaspore suitable for a ring?
It can be worn in a protective setting, but perfect cleavage makes it more vulnerable to sharp impact than its hardness suggests.
12. Is Diaspore a good investment?
Exceptional stones may attract collectors, but the resale market is limited. It should not be purchased based on guaranteed appreciation or suggested retail tables alone.
Diaspore Value Depends on Seeing Two Convincing Stones in One
A color-change Diaspore should be attractive under both cool and warm illumination. Weak green that shifts to muddy brown does not justify the same price as a vivid gem showing two clearly desirable appearances.
In 2026, fine one- to three-carat stones occupy a broad market from several hundred to several thousand dollars per carat. The strongest purchase combines genuine change, careful orientation, safe cutting and documentation that supports the material rather than relying entirely on a trademark or rarity claim.
