Firoza Stone (Turquoise) Price 2026: Untreated vs Stabilized, Irani vs American

A Firoza stone (turquoise) is one of the oldest gemstones worked by people, and one of the hardest to buy with confidence. Most turquoise sold worldwide has been stabilized with resin, untreated stone is a small minority, and a great deal of what is sold at the entry level is dyed howlite or magnesite, which contains no turquoise at all. That is why a turquoise stone price per carat means nothing until you know what the material is and how it has been treated. This guide explains how untreated Firoza differs from stabilized, dyed and reconstituted stone, how Irani and American turquoise compare, what Firoza costs, the ratti weight traditionally used for Guru, and the checks that tell you which one you are holding.

What is Firoza Stone (Turquoise)?

Firoza (also spelled Feroza or Phiroza) is the Persian and Urdu name for Turquoise — an opaque, sky-blue to blue-green hydrated copper aluminum phosphate mineral with the chemical formula CuAl₆(PO₄)₄(OH)₈·4H₂O. Crystallizing in the triclinic system, Firoza is one of the oldest gemstones known; the ancient Egyptians were already mining it in Sinai more than 5,000 years ago. The English name "Turquoise" comes from the French "pierre turquoise" ("Turkish stone"), as historical trade routes carried the gemstone from Persian mines through Turkey to Europe.

Firoza’s classic sky-blue color is driven by the presence of copper ions. When iron replaces aluminum in the crystal lattice, the color shifts towards green. Distinct origins yield different matrix (host rock) and mineral profiles:

• Persian (Irani) Firoza: Sourced from the ancient mines of Nishapur (Iran). Famous for its intense, clean, matrix-free "robin's egg" blue. Its finest material is the historic benchmark, though Nishapur produces every grade.
• American Firoza:
  • Sleeping Beauty (Arizona): Celebrated for pure, matrix-free sky-blue color. The mine closed in 2012, making remaining stocks highly collectible.
  • Kingman (Arizona): Yields diverse colors, often showing black webbing matrix.
  • Morenci (Arizona): Highly prized for metallic iron pyrite inclusions that shine like silver.
  • Bisbee (Arizona): Known for deep blue colors set in a smoky, chocolate-brown matrix.
• Tibetan Firoza: Typically greenish-blue to deep green due to high iron content, displaying bold spiderweb matrix lines composed of limonite (hydrated iron oxide).

Types of Turquoise by Origin

Firoza Stone Price per Carat (2026)

Two separate things set the price of a Firoza stone: what the material is, and what has been done to it. Confusing the two is how buyers get caught. A stabilized stone with fine color can cost more than a plain untreated one, and an untreated Firoza is not automatically expensive — untreated only means nothing was added. What is genuinely rare, and priced accordingly, is a stone that is untreated, evenly colored, intensely blue and free of matrix all at once. A low price per carat is not by itself evidence that a stone is treated or fake.

Each of these stones is listed as natural, untreated turquoise, with its origin and an independent laboratory report. Turquoise is sold per carat in India and more often per piece or per gram in the United States and Europe, so compare per-carat rates where you can.

What Affects Firoza Price?

• Origin: A famous source lifts price at the top of the market — fine Persian and Sleeping Beauty above all — but origin does not set price by itself. Grade within a single mine varies enormously
• Color: Pure, intense sky-blue ("robin's egg") is most valuable; greenish tones reduce value
• Matrix: Clear (no matrix) is rarest and most valuable; fine spiderweb adds value; heavy matrix reduces value
• Treatment: only a small share of turquoise reaches the buyer untreated, so an untreated stone is worth more than an identical stabilized one. Untreated by itself does not make a stone costly — color and matrix still set the rate
• Size: Larger stones of good quality are progressively rarer

Understanding Turquoise Treatments

Turquoise is porous and soft, so most of what reaches the commercial market has been treated to harden it or hold its color, and only a small share is sold exactly as it came out of the ground. Treatment is not the problem — undisclosed treatment is. These are the five categories you will meet, and what separates them:

How to Identify Original Firoza Stone

Turquoise has more convincing imitations than almost any other gemstone. The two you will meet most often are dyed howlite, a calcium borosilicate, and dyed magnesite, a magnesium carbonate. Both are white minerals that take blue dye readily, and both carry dark veining that passes easily for natural matrix. Gilson synthetic turquoise is the third. Here is how to separate them:

Test 1: Acetone Swab Test (For Dyed Imitations)

This simple test reveals many dyed stones, whether the dye has been applied to howlite, magnesite or pale turquoise. Use it only on a stone you already own, as acetone can also dull wax or resin coatings:

1. Dip a cotton swab in pure acetone (nail polish remover).
2. Gently rub the swab on an inconspicuous back area of the stone.
3. If the cotton swab turns blue or green, the stone is dyed. Natural or resin-stabilized turquoise will not bleed color. Note that the reverse does not hold: a sealed or waxed dyed stone can pass this test, so a clean swab is encouraging but not proof.

Test 2: Microscopic Examination & Matrix Check

Examine the stone under a 10x magnification loupe or microscope:

• Natural Matrix: A genuine matrix (vein pattern) is irregular, jagged, organic, and embedded into the stone. It often contains natural metallic pyrite spots or brown limonite zones.
• Dyed Howlite/Magnesite: Look for dye concentration where color pools inside fractures and surface pits. You may also find unpenetrated white spots when inspecting deeper cavities.
• Gilson Synthetic: Displays a highly uniform microcrystalline structure, often completely clean, or showing artificial, "too-perfect" matrix lines that lack mineral diversity.

Test 3: Why the Scratch and Weight Tests Fail on Turquoise

The check that genuinely works at home needs no equipment. Look closely at a drill hole, a chip, or any unpolished edge: dyed howlite and magnesite are white or grey underneath, and the blue stops where the dye stopped soaking in, while genuine turquoise carries its color through the body of the stone. The two tests below are repeated everywhere and neither is reliable, which matters because a bad test will convince you that a genuine stone is fake:

• Do not scratch a turquoise. Firoza is Mohs 5.0 to 6.0 and a steel needle is about 5.5, so a needle will mark softer genuine turquoise exactly as it marks howlite at 3.5. The test cannot separate the two, and it leaves permanent damage on a stone you have paid for.
• Weight in the hand proves nothing. Turquoise has a specific gravity of 2.60 to 2.90; howlite is about 2.58. That difference is far too small to feel. Only moulded plastic is obviously light, and plastic gives itself away by mould seams and by warming quickly to the touch, not by weight.

Test 4: Lab Spectroscopy (The Most Reliable Method)

Professional laboratories use advanced spectroscopy to verify authenticity:

• Raman / Infrared Spectroscopy: Confirms the chemical signature of hydrated copper aluminum phosphate, instantly exposing howlite (borosilicate) or magnesite (carbonate) fakes.
• EDXRF Spectroscopy: Detects elemental composition, revealing elevated potassium levels characteristic of the Zachery process.

Firoza in Vedic Astrology

In Vedic tradition, Firoza is commonly named as an upratna, or substitute stone, for Pukhraj (Yellow Sapphire), and is associated with Jupiter (Guru). Some traditions also link it with Ketu. It is generally chosen when a fine Pukhraj is out of reach, or when a larger stone is wanted for the same planet. Whether a stone suits you, and at what weight, is for your own astrologer or Pandit ji to advise.

Traditional Symbolism of Firoza

Across the cultures that have prized it, turquoise has been traditionally associated with:

• Wisdom, learning and balanced judgement — the qualities traditionally given to Guru
• Travel. Turquoise was known as the traveller's stone in Persia, Tibet and the American Southwest, and was often fixed to a horse's bridle long before it was set in a ring
• Clear speech and fair dealing with others
• Victory and good fortune in Persian tradition. The name Firoza comes from the Persian word "pirouzeh", meaning victory
• A stand-in for Pukhraj when a fine Yellow Sapphire is out of reach

Choosing a size: a common custom links stone size to body weight: about 1 Ratti for every 10 kg, so 6 Ratti for someone who weighs 60 kg. One Ratti (the pakki ratti used on our listings) is 0.91 carat. Whatever size you choose, make sure the natural Firoza stone comes with its treatment stated in writing — untreated, or stabilized.

How to Evaluate Turquoise Quality

Turquoise is evaluated differently from transparent gemstones:

1. Color (the most important factor)

• Best: Intense, pure "robin's egg" or sky blue
• Good: Medium blue with slight green tint
• Average: Blue-green or green-blue
• Lower: Pale blue, heavily greenish, or grayish

2. Matrix

• Best: Clear (no matrix) — rarest
• High: Fine spiderweb matrix — adds character
• Average: Moderate matrix patterns
• Lower: Heavy, unattractive matrix dominating the stone

3. Treatment

• Best: Natural, untreated — only a small share of the market reaches the buyer this way
• Standard: Stabilized — the industry norm, permanent and accepted when disclosed
• Lower: Dyed — the color is not the stone's own and can fade
• Avoid: Reconstituted block, and any stone offered with no treatment stated

4. Origin

• Persian (Irani): fine material sets the world benchmark, ordinary material is priced modestly. The name alone is not a grade
• American: Sleeping Beauty closed in 2012 and Bisbee in 1975, so both are finite and collected
• Tibetan: green-toned with bold spiderweb, valued more by collectors than by the trade
• Chinese: supplies most of the world's turquoise today, at every grade from commercial to fine

How to Care for Firoza Jewelry

Because Firoza is a relatively soft (Mohs 5.0–6.0) and porous gemstone, it requires careful handling to prevent color shifts and structural damage:

• Cleaning: wipe gently with a soft cloth, or a barely damp one, and dry it at once. Never soak turquoise, and keep it away from detergent, jewellery dip and any acid, which can soak into the pores and change the colour permanently.
• Never use an ultrasonic or steam cleaner: the heat and agitation can damage the resin or wax in a treated stone and can crack a porous untreated one.
• Chemical Exposure: Always apply makeup, lotions, perfumes and hairspray first, and put your Firoza on last. Remove the stone before cooking, swimming, or doing heavy labor.
• Storage: Store Firoza separately in a soft cloth pouch, away from direct sunlight, to prevent it from getting scratched by harder gems like Sapphires or Rubies.

Buying Checklist: Original Firoza

Before purchasing, verify:

• ✓ Treatment stated in writing — unheated and untreated, stabilized, or dyed. Check this first, not last
• ✓ Lab report from a recognised laboratory identifying the material as natural Turquoise
• ✓ Matrix that looks natural and irregular, never uniform, painted or repeating
• ✓ Color that runs through any chip, drill hole or unpolished edge, not just across the surface
• ✓ A per-carat rate shown on the listing, so you can compare one stone against another
• ✓ A color you actually like. Sky blue, blue-green and green are preferences and price levels, not tests of whether a stone is real
• ✓ Return policy in writing

For comprehensive gemstone evaluation guidance, see our complete gemstone buying guide.

Why Buy Firoza from Ratna Gems?

Every Turquoise from Ratna Gems comes with:

• Lab Report With Every Stone: identified as natural turquoise by an independent, ISO-certified laboratory, at no extra charge; a GII, IIGJ or IGI report can be added on the product page, priced by carat weight. Never dyed howlite, never reconstituted block.
• Origin and Treatment on Every Listing: Irani or American, and the treatment, stated on the listing beside the laboratory conclusion, with the price per carat.
• 7-Day Returns: return an unused stone in its original condition within 7 days of delivery, as set out in our return policy.

View Our Firoza Collection

Frequently Asked Questions