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Rosefire Phoenix

Rose, amethyst & a little magic

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Midnight Phoenix

Sapphire light & midnight wings

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Forever SnS Crystal Passport

Smoky Citrine

Pronounced: SMOH-kee SIT-reen

Smoky Citrine is a commercial name used for Quartz showing a mixture of golden-yellow Citrine colour and smoky brown colouration, sometimes as distinct zones within the same crystal.

Formula: SiO₂Mohs hardness: 7System: Trigonal
Smoky CitrineCW

Meet the crystal

About Smoky Citrine

Smoky Citrine is a trade name used for Quartz that displays both Citrine-like golden, yellow or honey tones and smoky brown colouration. It is not a separate mineral species. The underlying mineral is Quartz. The name is useful commercially because some natural Quartz crystals genuinely contain both Citrine and Smoky Quartz colour zones, producing a combination of warm golden and smoky brown tones within the same specimen. Natural examples are known, including material from Madagascar where crystals have been documented with brownish-yellow Citrine cores and smoky outer rims or terminations. However, the term Smoky Citrine is not tightly standardised. Some sellers may use it for Quartz that is simply brownish-yellow, while other specimens may have been heat treated or otherwise colour modified. For that reason, colour alone cannot prove whether a specimen is naturally coloured or treated. Within the Forever SnS Crystal Passport, Smoky Citrine is kept as its own searchable entry because customers frequently encounter the name independently and may reasonably want to understand how it relates to Citrine and Smoky Quartz.

Explore this passport

Showing Science & Formation

Scientific passport

The mineral facts

Observable and measurable properties used to describe and identify this mineral.

Chemical formula
SiO₂
Mineral class
Silicate — Quartz
Crystal system
Trigonal
Mohs hardness
7
Lustre
Vitreous
Streak
White
Specific gravity
Approximately 2.65
Transparency
Transparent to translucent

Common colours

Golden yellow, honey, brownish yellow, smoky brown and grey-brown

Cleavage and fracture

No true cleavage; conchoidal fracture.

From the Earth

How it forms

The geological processes that create this crystal over time.

Formation

Its geological story

Smoky Citrine forms when Quartz develops both yellow to golden and smoky colour centres during natural crystal growth and later geological processes. Citrine colour is associated with iron-related colour mechanisms within Quartz, while smoky colour is commonly linked to aluminium-related defects affected by natural irradiation. Where these colour-producing conditions overlap, the same crystal may develop both golden Citrine and smoky brown zones.

A closer look

Scientific notes

Smoky Citrine is a trade name rather than a recognised separate mineral species. Mineralogically, the material is Quartz. Mindat lists Smoky Citrine as a synonym of Smoky Quartz, but documented specimens also exist in which Citrine and Smoky Quartz occur together naturally within one crystal. Because Citrine and Smoky Quartz are both colour varieties of Quartz, boundaries between them can sometimes be subjective when yellow, brown and smoky tones overlap. Natural colour cannot be confirmed reliably from appearance alone, because heat treatment and irradiation can alter Quartz colour.

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