Mineral
Rutile
TiO₂Rutil
The titanium dioxide mineral: reddish brown and shiny, and the real substance of the golden threads inside rutilated quartz.
- Popularly: Ore and raw material
- Ore
- Industrial
- Important in Türkiye
In short
Rutile is a mineral made of titanium and oxygen (TiO₂). Its reddish-brown, shiny crystals are long and striated, and it also forms fine needles inside other minerals such as quartz and sapphire. It is the second important ore of titanium, but only about 5% of the world’s titanium mineral output is rutile.
Photos
How does it form?
Rutile is a common accessory mineral formed at high temperature and pressure: it occurs in igneous rocks, anorthosite and granite pegmatites, in hydrothermally altered rocks, in gneiss and schist, in contact-metamorphosed limestone and in clays. Because it is heavy and durable, it is also common as a detrital mineral in sands and gravels; the rutile mined from mineral sands in Sierra Leone, for example, comes from deposits of this kind.
During the growth of minerals such as quartz and sapphire, rutile can be trapped inside them as fine needles.
What is it used for?
- Titanium ore: It is the second important ore of titanium (the main one is ilmenite). Titanium metal is light, as strong as steel and resistant to corrosion.
- Pigment: Titanium dioxide is used as a white pigment in paint, plastic, paper and food.
- Welding rods: According to the USGS, a small share of titanium mineral concentrates goes into welding-rod coatings; Wikipedia lists rutile among welding electrode coatings.
- Sunscreen: Nanoscale TiO₂ particles absorb ultraviolet light and are used in sunscreens.
- Optics: It is used in optical parts, especially polarisation optics (Wikipedia).
- Jewellery: Rutile needles give stones a star effect; needles inside quartz make rutilated quartz.
Rutilated quartz
When rutile needles grow inside clear or smoky quartz, the result is rutilated quartz: golden, copper-red, silver or black needles appear as a bundle or a star. The threads in the quartz are not gold or copper but rutile. This stone has a page of its own: rutilated quartz.
In Türkiye
In Türkiye rutile is listed, together with ilmenite, among the ore minerals of the Fe-Ti-(V) oxide mineralisation in the Azıtepe meta-gabbros in Alaşehir district, Manisa (Sutcu et al., 2025); for details see the ilmenite page.
On a smaller scale, rutile has been recorded among the minor minerals of the bastnäsite-fluorite-baryte deposit at Kızılcaören in Eskişehir (Gültekin et al., 2003; for the deposit see the bastnäsite page) and, at the Başnayayla molybdenum-copper mineralisation in Yozgat, as abundant net-like (sagenitic) crystals inside chloritised biotite (Kuşçu and Genç, 1999). These two places are not rutile mines but sites where the mineral has been recorded scientifically.
What determines its value?
Rutile is an ore, and its value depends on the proportion of titanium dioxide in the concentrate (rutile is very pure, and commercial rutile concentrate contains at least 95% TiO₂), the size of the deposit, the cost of separating it from beach sands and demand from the pigment and titanium industries. Rutile is far scarcer than ilmenite: according to the USGS, world rutile output in 2025 was about 450 thousand tonnes (TiO₂ content), of which Australia produced 200 thousand, Sierra Leone 110 thousand and South Africa 100 thousand. For collectors, well-formed, lustrous, twinned crystals and famous localities such as Graves Mountain (Georgia) or Brazil count.
This information is educational, not buying, selling or investment advice. Value varies enormously with quality and treatment.
How to recognise it
- 1
It is reddish brown, red or yellowish, with a lustre between diamond-like (adamantine) and semi-metallic. The streak (powder colour) is pale brown.
- 2
Its hardness is 6–6.5 and its specific gravity about 4.2–4.3: a steel knife cannot scratch it, and it is clearly heavier than quartz.
- 3
Crystals are long, striated prisms or needles. Twinned crystals may be bent like a knee or arranged in a net (sagenite).
- 4
If golden to red needles are seen inside a quartz crystal, the stone is rutilated quartz; the needles themselves are rutile.
Fakes and imitations
What shops usually don’t tell you:
- Titania: colourless, transparent, very sparkling “Titania” stones are not natural rutile but synthetic rutile, made since 1948 and marketed as a diamond imitation. Natural rutile is reddish brown, red or pale yellow and mostly opaque.
- Anatase and brookite, which have the same TiO₂ composition, can be mistaken for rutile; the three have different crystal structures, and a sure distinction needs analysis.
Myths and misconceptions
MythTitanium is obtained mainly from rutile.
FactAbout 95% of titanium mineral output is ilmenite: according to the USGS, world production in 2025 was about 9.4 million tonnes of ilmenite and 450 thousand tonnes of rutile (TiO₂ content). Rutile is a purer but far scarcer ore.
MythThe colourless, dazzlingly sparkling “Titania” stone is a natural gem.
FactTitania is synthetic rutile, made in the laboratory since 1948 and marketed as a diamond imitation. Natural rutile is mostly reddish brown and opaque.
Did you know?
The name comes from the Latin rutilus, “red”. Rutile was described in 1803 by Abraham Gottlob Werner from specimens from the area of Horcajuelo de la Sierra in Spain.
Rutile has one of the highest refractive indices of any known crystal in visible light (Wikipedia).
The star effect (asterism) in star sapphires and star rubies is produced by fine needles of rutile inside the stone.
TiO₂ has three mineral forms: rutile, anatase and brookite. According to Wikipedia, rutile is the most stable of them at all temperatures.
Where is it found?
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- Horcajuelo de la Sierra, Madrid, Spain · Type localityRutile was described in 1803 by Abraham Gottlob Werner from specimens from this place
- Graves Mountain (near Lincolnton), Georgia, USA · Known localityAccording to the Handbook of Mineralogy, one of the places known for fine rutile crystals (location given as Lincolnton town)
- Tavetsch (Tujetsch), Graubünden, Switzerland · Known localityAccording to the Handbook, Cavradi in Tavetsch is among the places that give fine rutile crystals
- Magnet Cove, Arkansas, USA · Known localityA mineral district known for rutile, brookite, anatase, perovskite and others
- Moyamba District (Sierra Rutile), Sierra Leone · Major depositSierra Rutile has produced rutile, ilmenite and zircon from mineral sands since 1967 and presents itself as the world's largest natural rutile deposit. According to the USGS, Sierra Leone is the world's second-largest rutile producer
- Kragerø, Telemark, Norway · Known localityMTA's table of titanium deposits gives it as an example of albitic (sodium-feldspar-rich) rutile deposits
- Azıtepe, Alaşehir, Manisa, Türkiye · Known localityFe-Ti-(V) oxide mineralisation in meta-gabbro of the Menderes Massif; rutile and ilmenite are listed among the ore minerals (location given as Alaşehir town)
Locations are approximate to protect sites. Red dots mark places in Türkiye. Open in the big map →
Frequently asked questions
What is rutile?
Rutile is a mineral made of titanium and oxygen (TiO₂). Its reddish-brown, shiny crystals are long and striated, and it also forms fine needles inside other minerals such as quartz and sapphire. It is the second important ore of titanium, but only about 5% of the world’s titanium mineral output is rutile.
What is rutile used for?
Titanium ore: It is the second important ore of titanium (the main one is ilmenite). Titanium metal is light, as strong as steel and resistant to corrosion. Pigment: Titanium dioxide is used as a white pigment in paint, plastic, paper and food. Welding rods: According to the USGS, a small share of titanium mineral concentrates goes into welding-rod coatings; Wikipedia lists rutile among welding electrode coatings. Sunscreen: Nanoscale TiO₂ particles absorb ultraviolet light and are used in sunscreens. Optics: It is used in optical parts, especially polarisation optics (Wikipedia).
How hard is rutile?
It has a hardness of 6–6.5 on the Mohs scale. It can scratch glass; a steel knife scratches it only with difficulty. Its specific gravity is 4.23–4.25 g/cm³.
Where is rutile found?
Its best-known localities: Horcajuelo de la Sierra, Madrid, Spain; Moyamba District (Sierra Rutile), Sierra Leone; Graves Mountain (near Lincolnton), Georgia, USA; Tavetsch (Tujetsch), Graubünden, Switzerland; Magnet Cove, Arkansas, USA.
Where is rutile found in Türkiye?
Known localities in Türkiye: Azıtepe, Alaşehir, Manisa, Türkiye.
How can you tell if rutile is real?
It is reddish brown, red or yellowish, with a lustre between diamond-like (adamantine) and semi-metallic. The streak (powder colour) is pale brown. Its hardness is 6–6.5 and its specific gravity about 4.2–4.3: a steel knife cannot scratch it, and it is clearly heavier than quartz. Crystals are long, striated prisms or needles. Twinned crystals may be bent like a knee or arranged in a net (sagenite). Titania: colourless, transparent, very sparkling “Titania” stones are not natural rutile but synthetic rutile, made since 1948 and marketed as a diamond imitation. Natural rutile is reddish brown, red or pale yellow and mostly opaque.
Is rutile valuable?
On the “street to diamond” value ladder it sits on step 4 of nine: Fine dimension stone and ore. Rutile is an ore, and its value depends on the proportion of titanium dioxide in the concentrate (rutile is very pure, and commercial rutile concentrate contains at least 95% TiO₂), the size of the deposit, the cost of separating it from beach sands and demand from the pigment and titanium industries. Rutile is far scarcer than ilmenite: according to the USGS, world rutile output in 2025 was about 450 thousand tonnes (TiO₂ content), of which Australia produced 200 thousand, Sierra Leone 110 thousand and South Africa 100 thousand. For collectors, well-formed, lustrous, twinned crystals and famous localities such as Graves Mountain (Georgia) or Brazil count.
Sources
- Handbook of Mineralogy: Rutile · Mineralogical Society of America
- Rutile · Wikipedia
- Rutile (Webmineral) · Webmineral
- Mineral Commodity Summaries 2026: Titanium Mineral Concentrates · U.S. Geological Survey, 2026
- Üretiminden ticari kullanımına titanyum (Yücel, MTA Doğal Kaynaklar ve Ekonomi Bülteni 26: 63–76) · MTA Genel Müdürlüğü, 2018
- Origin and evolution of vanadium (V) enrichment in Azıtepe (Alaşehir-Manisa) meta-gabbroic rocks in Menderes massif (Western Turkiye) (Sutcu et al.), Geochemistry · Elsevier, 2025
- Başnayayla (Yozgat) Molibden-Bakır Cevherleşmesi (Kuşçu & Genç), Türkiye Jeoloji Bülteni 42(2) · Türkiye Jeoloji Kurumu, 1999
- Seçili makale özleri: Kızılcaören fluorite-barite-REE deposit (Gültekin, Örgün & Suner, Journal of Asian Earth Sciences 21: 365–376) · İstanbul Teknik Üniversitesi
- Sierra Rutile · Wikipedia
- Magnet Cove, Arkansas · Wikipedia
- Horcajuelo de la Sierra · Wikipedia
- Lincolnton, Georgia · Wikipedia
- Tujetsch · Wikipedia
- Kragerø · Wikipedia
- Moyamba District · Wikipedia
- Alaşehir · Wikipedia
External links
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