rectangle-cut serandite - Canada
rectangle-cut serandite - Canada

Serandite Value, Price, and Jewelry Information


To date, only one locality — Mont St. Hilaire, Quebec, Canada — has produced facetable serandite. These extremely rare gems are very small and usually cut from less than transparent crystal fragments.

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To date, only one locality — Mont St. Hilaire, Quebec, Canada — has produced facetable serandite. These extremely rare gems are very small and usually cut from less than transparent crystal fragments.

rectangle-cut serandite - Canada
Rectangle-cut serandite, 1.87 cts, 10.0 x 5.0 x 3.0 mm, Mont St. Hilaire, Quebec, Canada. © Rob Lavinsky, www.iRocks.com. Used with permission.

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Serandite Value

baguette-cut serandite - Canada
Baguette-cut serandite, 0.50 cts, 6.1 x 3.4 x 2.5, Mont St. Hilaire, Quebec, Canada. © ARK Rare Gems. Used with permission.
serandites and aegirine - Canada
Serandites with black aegirine crystals, 6.2 x 5.5 x 3.9 cm, Poudrette quarry, Mont St-Hilaire, Quebec, Canada. © Rob Lavinsky, www.iRocks.com. Used with permission.

What is Serandite?

Serandite (formerly spelled "sérandite") forms a mineral series with pectolite. Serandite is the manganese (Mn) end member, while pectolite is the calcium (Ca) end member. Of the two, serandite is the rarest by far.

Does Serandite Make a Good Jewelry Stone?

You're more likely to find serandites, if at all, in mineral collections than jewelry collections. With a hardness of 4.5 to 5.5 and perfect cleavage, this gem would require protective jewelry settings to reduce the risk of scratches and blows. Reserve this rare gem for occasional wear in rings or for earrings, brooches, or other pieces less subject to impacts.

serandites - crystal and gem, Canada
Serandites, Mont St. Hilaire, Quebec, Canada (gemstone around 1.5 cts, rough approximately 2 inches long). Photo © Joel E. Arem, PhD, FGA. Used with permission.

Identifying Characteristics

The refractive indices (RI) of the pectolite-serandite series vary with the presence of Ca and Mn.

pectolite-serandite series RI
Chart © Joel E. Arem, PhD, FGA. Used with permission.

Schizolite (formerly "marshallsussmanite") is an intermediate member of this series.

Are There Synthetic Serandites?

rectangular step-cut serandite - Canada
Rectangular step-cut serandite, 0.50 cts, 7 x 3.1 mm, Mont St. Hilaire, Quebec, Canada. © The Gem Trader. Used with permission.

Scientists have synthesized serandites for research purposes. However, there's no known jewelry use for this material.

There are no known gemstone treatments or enhancements.

Where are Serandites Found?

Although serandite occurs in numerous locales across the globe, it remains a rare mineral. Only Mont St. Hilaire in Quebec, Canada has produced cuttable material, but even large crystals found here seldom have transparent, facetable areas. 

Rouma Isle, Los Islands, Guinea is the type locality for this mineral.

Other sources include the following locations:

  • United States: Arkansas; California; New Mexico.
  • Japan; Russia; South Africa.

Stone Sizes

Cut serandites very rarely weigh more than 2-3 carats. In fact, faceted gems of any size are very rare.

  • Smithsonian Institution (Washington, DC): 2+ (Quebec). 
  • Private Collection: 5+ (flawed).
  • National Museums of Canada (Ottawa, Ontario): 18.65, 2.8 (translucent).
oval cabochon
Oval cabochon serandite, 4.85 cts, 18 x 9.6 mm, Mont St. Hilaire, Quebec, Canada. © The Gem Trader. Used with permission.

Caring for Serandites

Clean serandites only with a soft brush, mild detergent, and warm water. Consult our gemstone jewelry cleaning guide for more care recommendations.

Serandite: Mont St. Hilaire, Quebec, Canada (0.7). Photo © Joel E. Arem, PhD, FGA. Used with permission.

Joel E. Arem, Ph.D., FGA

Dr. Joel E. Arem has more than 60 years of experience in the world of gems and minerals. After obtaining his Ph.D. in Mineralogy from Harvard University, he has published numerous books that are still among the most widely used references and guidebooks on crystals, gems and minerals in the world.

Co-founder and President of numerous organizations, Dr. Arem has enjoyed a lifelong career in mineralogy and gemology. He has been a Smithsonian scientist and Curator, a consultant to many well-known companies and institutions, and a prolific author and speaker. Although his main activities have been as a gem cutter and dealer, his focus has always been education. joelarem.com


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