Larimar: How to Tell Real Larimar from Fakes

Real larimar is a blue variety of the mineral pectolite, and it comes from only one place on earth: a mountainside in Barahona province, in the southwest of the Dominican Republic. The surest way to tell it from a fake is its structure. Genuine larimar is built from fine radiating fibers, so it shows a silky shimmer that moves as you turn it, and its blue sits in soft, irregular cells and waves outlined in white, the pattern known as turtle back. Dyed howlite and magnesite, glass, resin and blue chalcedony are the usual imitations, and each gives itself away with a few simple checks.

Our larimar bead collection has every larimar strand we carry in one place. Below is what larimar is, what its imitations look like, and a short checklist you can run on any strand before you buy.

What Is Larimar?

Pectolite is a sodium calcium silicate that turns up in volcanic rocks around the world, usually as dull white or grey needles. Only in the Dominican Republic is it sky blue. There it crystallized in gas pockets and cracks in volcanic rock as dense masses of tiny fibers, and nearly all of it is dug by hand from narrow shafts at Los Chupaderos, in the hills southwest of the city of Barahona. Loose pieces also wash down to the coast, which is how the stone first came to attention.

In 1974 Miguel Méndez and Norman Rilling, a Peace Corps volunteer, found blue stones on a beach at the foot of the Bahoruco Mountains and traced them back to their source. Méndez named the stone by joining his daughter's name, Larissa, with mar, the Spanish word for sea.

The blue comes from traces of metal in the pectolite, though which metal is still being studied. Copper was long given the credit, and many descriptions still say so. A 2023 study published in the journal Minerals found very little copper in larimar and pointed instead to vanadium as the main cause of the blue, with iron pushing the color toward green. Whichever metal is responsible, the color is sensitive to strong light and heat, which matters for how you wear and store it.

What Real Larimar Looks Like

Color

Larimar runs from nearly white through pale sky blue to turquoise, deeper volcanic blue and sea green, usually with more than one of these in a single bead. Most of it is pale. The deep, saturated blues are the least common and the most expensive. Small brown or reddish spots are mineral inclusions and are not a sign of a fake.

Turtle Back and Sea Wave Patterns

Because the fibers grow in bundles that radiate from many centers, real larimar shows rounded cells with white rims and blue centers, like the plates of a turtle shell, or wavy bands like sunlight on shallow water. No two beads match.

A Silky, Fibrous Shimmer

Turn a polished bead under a lamp and a soft, silky glow slides across it as the light catches the fibers. Under a 10x loupe you can often see the fibrous, feathery texture itself. Glass and resin have no fibers, so they show a flat shine instead.

Weight and Feel

Pectolite has a specific gravity of about 2.8, so larimar feels solid and cool when you first pick it up. It is far heavier than resin or plastic and a little heavier than howlite or glass of the same size. Dyed magnesite is about as heavy, though, so weight alone cannot rule it out.

Common Larimar Fakes and Look-Alikes

Dyed Howlite and Magnesite

Both are white, porous stones that soak up dye, and dyed blue they are sold as larimar or turquoise. Their giveaways are color that pools in cracks, pits and around the drill hole, a flat, even blue, and veining that forms a web of thin dark lines rather than larimar's soft white clouds. Our post What Is White Turquoise? Don't Be Fooled, It's Just Howlite covers howlite in more detail, and you can see white howlite in our howlite beads.

Glass

Swirled blue and white glass can look convincing at arm's length, and gem labs have reported glass imitations good enough to need testing. Look for round gas bubbles, swirl lines that flow and repeat from bead to bead, a very glassy shine, and beads that all look the same.

Resin and Plastic

Resin and plastic beads are light and feel warm in the hand, and some show faint mold seams.

Blue Chalcedony and Other Blue Stones

Blue chalcedony is translucent, waxy and evenly pale, with no cells or fibers, and it is harder than larimar at 6.5 to 7. Blue lace agate shows fine parallel bands.

"Atlantis Stone" and Other Names

Larimar is also sold under nicknames such as Atlantis stone and dolphin stone. A nickname is not a warning sign by itself, but it is no guarantee either: judge the bead, not the name. Since larimar is known only from the Dominican Republic, "larimar" said to come from anywhere else is something else.

Larimar vs Common Fakes at a Glance

How to Tell Real Larimar from Fake: A Checklist

1. Study the pattern in daylight. Look for soft-edged, irregular cells and waves, with each bead a little different from the next.
2. Use a 10x loupe. Real larimar shows a fibrous texture. Round bubbles point to glass.
3. Tilt it under a lamp. A silky glow that slides across the surface is a good sign. Glass tends to throw back a single sharp spot of light.
4. Check the cracks and the drill hole. Dye gathers there in darker lines and rings. Brown iron staining can also sit in cracks, so look at the color: blue concentrated in cracks is the red flag.
5. Feel and weigh it. Larimar feels cool and solid. Plastic and resin feel warm and light. If you have a bead you trust, compare 2 of the same size.
6. Consider the price and the source. Larimar is mined by hand in one small district, so a strand of large, deep blue beads at a very low price deserves questions.
7. Use acetone only as a last step. Rub a cotton swab dampened with acetone inside the drill hole or on a hidden spot. Blue on the swab means dye. A clean swab does not prove the stone is larimar, since glass and resin carry no dye to lift, and acetone can dull resin, plastic and some polishes, so test a bead you can spare.

For a valuable piece, a gem lab can settle the question by measuring refractive index and specific gravity, which are about 1.60 and 2.8 for larimar.

Caring for Larimar

With a hardness of 4.5 to 5, larimar is softer than quartz, glass and steel, so it scratches if it rubs against harder beads or gritty surfaces. It shines in necklaces, pendants and earrings, and it will show wear sooner in a bracelet that knocks against a desk. Store it in its own soft pouch.

Keep larimar out of long, strong sunlight and away from heat, including sunny windowsills, hot cars and hot tubs, since both can fade the blue over time. Clean it with lukewarm water, a drop of mild soap and a soft cloth, then dry it. Skip ultrasonic and steam cleaners, and put larimar on after lotion and perfume rather than before.

Our larimar strands range from pale sky blue with white clouds to turquoise and sea green, as smooth round beads, microfaceted rondelles, smooth chips and raw nuggets.

Frequently Asked Questions

Is larimar only found in the Dominican Republic?

Yes. Larimar is known only from Barahona province in the southwest of the Dominican Republic. Pectolite from other countries is usually white, grey or pale green.

Why is larimar so expensive?

It comes from one small district, where it is mined by hand from narrow shafts, and the deep blue material is a small part of what comes out. That narrow supply keeps prices up.

Does larimar fade?

It can. Long exposure to strong light and heat slowly fades the blue, so store larimar out of the sun and away from heat.

What is the difference between larimar and turquoise?

Turquoise is a copper aluminum phosphate, opaque sky blue to green, often with a brown or black matrix web. Larimar is a silicate with white cloud and turtle back patterns and a silky shimmer. Compare them in our turquoise beads.

Is Atlantis stone the same as larimar?

Yes, Atlantis stone is a nickname for larimar. Check the bead itself for fibers, shimmer and an irregular pattern, as you would with any strand.

Can larimar get wet?

A quick rinse is fine. Don't soak it, and keep it out of hot tubs and pools, where heat and pool chemicals can dull the polish.

Shop Larimar Beads

Browse our larimar beads, or find more ocean colors among our blue gemstone beads and turquoise beads. For another stone that is often imitated, read Real vs Fake Malachite.