Is Turquoise hard enough for everyday rings?

Not ideally. At a Mohs hardness of 5–6, Turquoise is soft enough to scratch with everyday wear, so it is better suited to earrings, pendants, or occasional-wear rings with protective settings.

How can I tell Turquoise from dyed howlite?

Turquoise and dyed howlite can look alike to the naked eye, but they differ in measurable properties — refractive index (1.61–1.65 for Turquoise), specific gravity (2.6–2.91), and hardness (Mohs 5–6). A gemologist confirms the distinction with a refractometer and loupe; the Jewelry Identifier app gives a fast first read from a photo.

Does Turquoise come in colors other than sky blue?

Yes. Turquoise occurs in sky blue, blue-green, green. Color is driven by trace elements and treatment history, and it is one of the biggest factors in a stone's value.

* turquoise gemstone

Turquoise: identification, value, and how to spot a fake

Hydrous copper-aluminum phosphate. Naturally porous; almost universally stabilized for jewelry use. Persian (Iranian) and Sleeping Beauty (Arizona, mine closed) are premium sources. Sacred in Indigenous Southwestern US and Tibetan traditions.

Published May 30, 2026

Quick facts

Mineral family: turquoise
Chemical formula: CuAl6(PO4)4(OH)8·4H2O
Mohs hardness: 5–6
Refractive index: 1.61–1.65
Specific gravity: 2.6–2.91
Crystal system: triclinic
Luster: waxy
Birthstone month: December

Colors

Turquoise is found in sky blue, blue-green, green. The body color, its saturation, and how evenly it spreads through the stone are among the strongest drivers of value.

How to tell real from imitation

No single test settles it, but a few grounded checks quickly narrow things down for Turquoise. Hardness, brilliance, and the list of stones it is commonly confused with all give you something concrete to look for.

Scratch resistance: genuine Turquoise sits at Mohs 5–6, so it should resist scratching from softer materials — a stone that mars far too easily is suspect.
Brilliance & luster: Turquoise shows a waxy luster and a refractive index of 1.61–1.65; imitations often look glassier or flatter under the same light.
Density: a real Turquoise has a specific gravity near 2.6–2.91, so it feels heavier or lighter in the hand than many look-alikes of the same size.
Commonly imitated by: dyed howlite, magnesite (dyed), imitation turquoise, chrysocolla. If a deal looks too good, suspect one of these substitutes first.
Fast first read: photograph the stone in the Jewelry Identifier app to estimate the gemstone and its likely value range, then confirm anything important with a gemological lab.

Common treatments

stabilization (polymer impregnation, near-universal)
wax
dye
reconstitution

Treatments are routine for many Turquoise stones, but they materially affect value and should always be disclosed — an untreated, lab-certified stone commands a clear premium over a treated one.

What to know about Turquoise

Sources

Wikidata Q188043

* Frequently asked

FAQ

Q. Is Turquoise hard enough for everyday rings?: A. Not ideally. At a Mohs hardness of 5–6, Turquoise is soft enough to scratch with everyday wear, so it is better suited to earrings, pendants, or occasional-wear rings with protective settings.
Q. How can I tell Turquoise from dyed howlite?: A. Turquoise and dyed howlite can look alike to the naked eye, but they differ in measurable properties — refractive index (1.61–1.65 for Turquoise), specific gravity (2.6–2.91), and hardness (Mohs 5–6). A gemologist confirms the distinction with a refractometer and loupe; the Jewelry Identifier app gives a fast first read from a photo.
Q. Does Turquoise come in colors other than sky blue?: A. Yes. Turquoise occurs in sky blue, blue-green, green. Color is driven by trace elements and treatment history, and it is one of the biggest factors in a stone's value.

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