Is Heliodor hard enough for everyday rings?

Mostly. At a Mohs hardness of 7.5–8, Heliodor stands up to routine wear, though sharp knocks and abrasive dust can still mar it over years of daily use.

How can I tell Heliodor from citrine?

Heliodor and citrine can look alike to the naked eye, but they differ in measurable properties — refractive index (1.57–1.585 for Heliodor), specific gravity (2.69–2.78), and hardness (Mohs 7.5–8). A gemologist confirms the distinction with a refractometer and loupe; the Jewelry Identifier app gives a fast first read from a photo.

Does Heliodor come in colors other than yellow?

Yes. Heliodor occurs in yellow, golden yellow, greenish yellow. Color is driven by trace elements and treatment history, and it is one of the biggest factors in a stone's value.

* beryl gemstone

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

Yellow to golden beryl. Often grouped with 'golden beryl' as the same material. Strong, clear, affordable yellow gem.

Published May 30, 2026

Quick facts

Mineral family: beryl
Chemical formula: Be3Al2(SiO3)6 (Fe impurity)
Mohs hardness: 7.5–8
Refractive index: 1.57–1.585
Specific gravity: 2.69–2.78
Crystal system: hexagonal
Luster: vitreous

Colors

Heliodor is found in yellow, golden yellow, greenish yellow. 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 Heliodor. Hardness, brilliance, and the list of stones it is commonly confused with all give you something concrete to look for.

Scratch resistance: genuine Heliodor sits at Mohs 7.5–8, so it should resist scratching from softer materials — a stone that mars far too easily is suspect.
Brilliance & luster: Heliodor shows a vitreous luster and a refractive index of 1.57–1.585; imitations often look glassier or flatter under the same light.
Density: a real Heliodor has a specific gravity near 2.69–2.78, so it feels heavier or lighter in the hand than many look-alikes of the same size.
Commonly imitated by: citrine, yellow sapphire. 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

irradiation

Treatments are routine for many Heliodor 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 Heliodor

Yellow to golden beryl. Often grouped with 'golden beryl' as the same material. Strong, clear, affordable yellow gem.

Sources

Wikidata Q11422088

* Frequently asked

FAQ

Q. Is Heliodor hard enough for everyday rings?: A. Mostly. At a Mohs hardness of 7.5–8, Heliodor stands up to routine wear, though sharp knocks and abrasive dust can still mar it over years of daily use.
Q. How can I tell Heliodor from citrine?: A. Heliodor and citrine can look alike to the naked eye, but they differ in measurable properties — refractive index (1.57–1.585 for Heliodor), specific gravity (2.69–2.78), and hardness (Mohs 7.5–8). A gemologist confirms the distinction with a refractometer and loupe; the Jewelry Identifier app gives a fast first read from a photo.
Q. Does Heliodor come in colors other than yellow?: A. Yes. Heliodor occurs in yellow, golden yellow, greenish yellow. 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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