David K. Joyce Minerals

Mont Saint-Hilaire, Donnayite-Y

Donnayite is a rare mineral and Mont Saint-Hilaire is the type locality for this rare earth carbonate. The crystals all appear to be stepped hexagonal crystals but in reality the crystal forms are triclinic. The best specimens of this species come from this famous locality and here are some fine examples.

All prices in Canadian dollars. For payment in US$, deduct 16% or multiply by 0.84.

Click on any of the following thumbnails to view a larger image of the specimen.

Donnayite-(Y)Mont Saint-Hilaire, Donnayite-Y
  • Item #14671
  • Donnayite-(Y)
  • 3.9x2.2x2.1 cm
  • Largest Crystal Size: 6mm
  • $65.00
  • Mont Saint-Hilaire

  • Quebec, Canada
  • One 6mm donnayite-(Y) crystal and a number of smaller ones are scattered about this cluster of white calcite crystals. Associated with lots of tiny pyrite crystals.
Donnayite-(Y), CalciteMont Saint-Hilaire, Donnayite-Y
  • Item #16849
  • Donnayite-(Y), Calcite
  • 5.7x4.8x5.1 cm
  • Largest Crystal Size: 9mm
  • $110.00
  • Mont Saint-Hilaire
  • Monteregie
    Quebec, Canada
  • This specimen is a mound of calcite crystals with a partial brownish oxide coating and sporting many, many donnayite crystals. The donnayite crystals are, mostly, hemimorphic smaller crystals with the exception of one larger, yellowish, doubly terminated, pseudohexagonal prism. Very good for this mineral! Type locality!
Donnayite-(Y), CalciteMont Saint-Hilaire, Donnayite-Y
  • Item #16851
  • Donnayite-(Y), Calcite
  • 7.6x5.0x4.6 cm
  • Largest Crystal Size: 5mm
  • $85.00
  • Mont Saint-Hilaire
  • Monteregie
    Quebec, Canada
  • This cluster of creamy-white calcite crystals has many donnayite crystals on it. Most are 2mm or so but there is one that is 5mm and well formed. The donnayite crystals are associated with tiny pyrite crystals and the larger donnayite crystal on this piece has a dusting of them. Very nice!
Donnayite-(Y), Calcite, PyriteMont Saint-Hilaire, Donnayite-Y
  • Item #16853
  • Donnayite-(Y), Calcite, Pyrite
  • 4.6x3.8x1.4 cm
  • Largest Crystal Size: 7mm
  • $40.00
  • Mont Saint-Hilaire
  • Monteregie
    Quebec, Canada
  • This specimen shows a well terminated donnayite crystal on a pyrite encrusted calcite crystal matrix. The donnayite crystal is partially encrusted with pyrite crystals, as well! The back of the specimen has very little pyrite, lust white calcite crystals and smaller, well formed donnayite crystals.
Donnayite-(Y), CalciteMont Saint-Hilaire, Donnayite-Y
  • Item #16887
  • Donnayite-(Y), Calcite
  • 2.6x2.2x1.2 cm
  • Largest Crystal Size: 4mm
  • $35.00
  • Mont Saint-Hilaire
  • Monteregie
    Quebec, Canada
  • An excellent, 4mm, yellowish donnayite crystal is present on this plate of white calcite crystals. Really nice example!