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Kunzite and Hiddenite: Pink and Green Spodumene Explained

By Digital Towns Crystals · Last reviewed October 8, 2026

Short answer: kunzite is the pink to violet gem variety of spodumene, a lithium aluminum silicate (LiAlSi2O6) at Mohs 6.5 to 7, colored by trace manganese. Hiddenite is the green variety, named for a North Carolina find of 1879. Both come from lithium-rich pegmatites in Afghanistan, Brazil, Madagascar and California, both are strongly pleochroic, both split easily along two cleavages, and both can lose color under long exposure to bright light.

Where does the name kunzite come from?

Kunzite is one of the youngest gem names in the trade. According to GIA's kunzite history page, pink crystals from San Diego County, California were sent in 1902 to George Frederick Kunz, mineralogist for Tiffany & Co. Kunz confirmed the crystals were spodumene, but the unfamiliar color made them a new variety. Charles Baskerville, a chemistry professor at the University of North Carolina, named the stone in Kunz's honor in 1903. Minerals.net adds that kunzite stayed mostly a collector's stone until the 1990s, when it went mainstream.

Hiddenite is older. Minerals.net's hiddenite entry dates its discovery to 1879 and names it after William Earl Hidden, who helped identify it. The North Carolina town where it turned up then took the name Hiddenite. The mineral name itself goes back much further: webmineral traces "spodumene" to the Greek for "burnt to ash," a nod to the gray color of early specimens.

What is spodumene, mineralogically?

Spodumene is a pyroxene, a member of the same chain-silicate family as jadeite and diopside, but with lithium in the structure. That lithium is why the mineral matters well beyond jewelry.

Property Spodumene (kunzite, hiddenite)
Formula LiAlSi2O6
Crystal system Monoclinic
Mohs hardness 6.5 to 7
Specific gravity 3.18 (GIA); 3.1 to 3.2 range
Refractive index 1.660 to 1.676
Birefringence 0.014 to 0.016
Cleavage Two prismatic directions at 87 and 93 degrees
Lithium content 3.73% Li (8.03% Li2O)

The figures above come from GIA's kunzite entry, the Minerals.net spodumene page and webmineral, which calculates the lithium share from the formula. That 87 and 93 degree cleavage pair is characteristic of the pyroxene group and is the single most useful fact for a buyer: it explains why spodumene chips and splits more readily than its hardness suggests.

Why does spodumene matter for lithium?

Geology.com notes that throughout most of the 20th century spodumene was the most important ore of lithium metal. Lithium brines in Argentina, Chile and China later took over much of that role because brine is cheaper to process, but spodumene still matters when battery demand outruns brine supply. The pink and green gems are the transparent, colored exceptions in a mineral that is mostly dull, gray-white ore.

How big can spodumene crystals grow?

Bigger than almost any other mineral. Geology.com quotes USGS Bulletin 610 (1916) on the Etta Mine in the Black Hills of South Dakota, where crystals commonly reached 3 to 4 feet across and 30 feet long, and one "log" measured 42 feet long and 5 feet 4 inches in diameter. That single crystal would have yielded an estimated 90 tons of spodumene.

Gem crystals are smaller but still large by gem standards. GIA describes kunzite crystals as often blade-shaped, and its kunzite description page notes the Smithsonian holds a faceted heart-shaped kunzite of 880 carats. How such crystals grow so large in the water-rich last melt of a granite is covered in the pegmatite guide.

Where are kunzite and hiddenite found?

Gem spodumene needs a lithium-rich pegmatite with open pockets. Minerals.net lists the common companions as quartz, albite, lepidolite, muscovite, beryl, tourmaline and topaz, the classic lithium pegmatite suite.

  • Afghanistan: the most exceptional transparent crystals come from the Konar Valley, Paprok in Nuristan, and the Mawi and Darra-i-Pech pegmatites in Laghman.
  • California: the Pala District of San Diego County, where kunzite was first identified. Named claims include the Pala Chief, Oceanview (the "Big Kahuna Pocket" of 2009 to 2010), Elizabeth R., Vanderberg, Katerina and San Pedro mines.
  • Brazil: Galiléia and Resplendor in the Doce valley of Minas Gerais.
  • Madagascar: Ampatsikahitra in the Sahatany Valley.
  • Mozambique: Alto Ligonha, Zambezia Province.
  • North Carolina: Hiddenite and Stony Point in Alexander County, the home of true chromium-green hiddenite.

Large white, opaque spodumene also came from New England quarries such as Newry, Maine and Branchville, Connecticut. Those are mineral specimens, not gems.

What is the difference between kunzite, hiddenite and triphane?

Color, and the element behind it.

  • Kunzite: pink to violet, colored by manganese. GIA calls it the best-known spodumene variety.
  • Hiddenite: green. In the strict sense it is the chromium-colored green spodumene of Alexander County, North Carolina. Minerals.net notes that green spodumene from Afghanistan and Brazil is usually lighter, more yellowish and lacks chromium, yet the trade now applies the name to all of it.
  • Triphane: yellow to colorless. Geology.com points out that "triphane" was also an early name for spodumene in general, so 19th-century references to triphane mean the mineral, not the yellow gem.

For a buyer, the hiddenite naming drift is the important one. A "hiddenite" tumble today is almost certainly green spodumene from somewhere other than North Carolina, and that is fine as long as nobody prices it as if it came from the Adams Mine.

Why does kunzite change color with the viewing angle?

Spodumene is strongly pleochroic. Minerals.net describes colors ranging from yellow to violet in some transparent crystals as you turn them, with pink kunzite often looking deepest at the crystal terminations. GIA says the best color shows when you look down the length of the crystal, and Geology.com adds that cutters orient the table perpendicular to that long axis to capture it. A pale-looking crystal viewed from the side may look much richer end-on, which is worth checking in any listing photo.

Does kunzite fade, and is the color treated?

Yes on both counts, and the two are linked. GIA states that kunzite can be irradiated and then heated to enhance its color, and that both treated and natural color can fade with heat and bright light. Minerals.net adds that most kunzite is naturally very light and is commonly heated to intensify the pink and remove brownish tones. Geology.com recommends that valuable spodumene gems of any color be stored away from direct light. Hiddenite follows the same pattern: Minerals.net notes it can fade in bright light and that a deep emerald green can be produced by irradiating paler spodumene, which is very hard to tell from natural color.

The practical rule for a collector: treat any strongly saturated spodumene as a stone that should live in a drawer or a shaded cabinet. The full mineral-by-mineral comparison of light-sensitive stones, with a home test, is in crystals that fade in the sun.

What looks like kunzite?

Minerals.net's comparison list covers the usual suspects. Rose quartz is cloudier. Morganite, pink tourmaline, topaz and pink spinel are all harder. "Rose kunzite" is a false name used for synthetic pink sapphire. For hiddenite, emerald and green tourmaline are usually deeper green and harder, while peridot is more yellowish. The quickest field tells are the strong end-on color shift and the stepped, splintery breaks that the two cleavages leave on rough pieces. Pink tourmaline, the most common substitute in tumbles, is compared in detail in a planned kunzite vs pink tourmaline guide.

Is kunzite associated with anything in crystal traditions?

In crystal traditions kunzite is associated with love and an open heart, and hiddenite with the heart as well, mostly because of their soft pink and green colors. GIA notes that some people treat kunzite as an alternate February birthstone. These are customs, not properties of the mineral.

What to look for when you buy kunzite or hiddenite

Spodumene rewards a few minutes of checking before you pay.

  1. Ask about color origin. Natural, heated, or irradiated and heated all exist. A vivid pink or a deep emerald green at a tumble price is a reason to ask.
  2. Look end-on. Pleochroism means the best color sits along the crystal length. A listing that shows only the side view may undersell or oversell the piece.
  3. Check edges. Rough spodumene shows flat cleavage steps; fresh chips along edges are common and lower the value of crystals.
  4. Keep the name honest. "Hiddenite" without a locality usually means green spodumene from Afghanistan or Brazil.
  5. Plan for storage. Budget a closed box or a shaded shelf, since the color is the value.

Pieces in our stock that show these points:

  • Kunzite and hiddenite, raw and tumbled: offered as raw pieces around 10.8 to 13.7 g and polished tumbles around 7.4 to 11.4 g; the raw pieces are the place to see cleavage steps and end-on color.
  • Lepidolite mica: the purple lithium mica that grows alongside spodumene in the same pegmatites, sold as rough chunks and flat blades.
  • Pink Tourmaline: pink tourmaline in feldspar, the stone most often confused with kunzite and a good side-by-side comparison piece.
  • Watermelon Tourmaline on Albite Matrix 51g: a 52 g Brazilian pocket specimen on albite, showing the matrix that gem spodumene also grows from.

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Frequently asked questions

Is kunzite the same as spodumene?

Kunzite is spodumene. It is the pink to violet gem variety of the mineral LiAlSi2O6, colored by manganese. Hiddenite is the green variety and triphane the yellow one. All three share the same hardness of 6.5 to 7, the same two cleavages and a specific gravity near 3.18.

Where does real hiddenite come from?

In the strict sense, only Alexander County, North Carolina, where chromium gives it a true green and where it was found in 1879. Green spodumene from Afghanistan and Brazil is now sold as hiddenite too, but it is usually paler, more yellowish and lacks chromium.

Why is kunzite called an evening stone?

Because its pink can slowly fade under prolonged strong light. Minerals.net notes the fading is very slow, but many owners wear kunzite jewelry in the evening and keep specimens out of sunlight. Natural and treated colors both behave this way, so the habit applies to every piece.

Is kunzite durable enough for a ring?

Not for daily wear. Despite a hardness of 6.5 to 7, spodumene has two perfect cleavage directions and chips if knocked. Minerals.net says it is mostly set as a pendant or as a large decorative stone. Pendants, earrings and display pieces suit it far better than rings.

Is kunzite expensive?

Usually not. GIA notes kunzite can be quite affordable because it is relatively unknown, and large clean crystals are common enough that big faceted stones exist. Price rises with color saturation. Natural-color North Carolina hiddenite is the expensive exception.

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