David K. Joyce

Grenville, Marialite, etc., Montcerf, Quebec

Some excellent crystals and clusters of crystals of marialite, associated with titanite and pyroxene have been found recently near Montcerf, Quebec. Please note that the fluorescent red colour is more of a rich, deep-red than a pink-red as shown in the photos. I seemed to have had a difficult time capturing the real red colour. Some of the marialite crystals have a thin, brownish veneer? That is allanite-(Ce), a slight alteration overgrowth on the scapolite (Pers. Comm., P. Belley, 2108). Here are some examples for you!

All prices in Canadian dollars. For payment in US$, deduct 19% or multiply by 0.81.

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

MarialiteGrenville, Marialite, etc., Montcerf, Quebec
  • Item #17584
  • Marialite
  • 13.7x7.6x5.3 cm
  • Largest Crystal Size: 27mm
  • $65.00
  • Montcerf

  • Quebec, Canada
  • Many, sharp, creamy, prismatic marialite crystals cover the front of this piece. There is a little (I think) uninteresting amphibole on the right side. Displays well!
Marialite, Allanite-(Ce), PyroxeneGrenville, Marialite, etc., Montcerf, Quebec
  • Item #19724
  • Marialite, Allanite-(Ce), Pyroxene
  • 12.0x9.0x8.1 cm
  • Largest Crystal Size: m-70mm
  • $140.00
  • Zec Desert
  • Montcerf
    Quebec, Canada
  • A superb crystal of this variety of scapolite is perfectly presented on this mound of much smaller, dark green, pyroxene crystals. The marialite crystal is creamy white and, as is usually the case, has a slight alteration coating of allanite-(Ce). Displays perfectly!
Marialite, Allanite-(Ce), PyroxeneGrenville, Marialite, etc., Montcerf, Quebec
  • Item #19727
  • Marialite, Allanite-(Ce), Pyroxene
  • 4.2x2.9x2.3 cm
  • Largest Crystal Size: 38mm
  • $40.00
  • Zec Desert
  • Montcerf
    Quebec, Canada
  • A couple of sharp marialite crystals, one long and slender, the other larger and broad cling together in this nice specimen. The dark-coloured veneer on the marialite crystals is allanite-(Ce). Nice!
Titanite, Marialite, Allanite-(Ce), PyroxeneGrenville, Marialite, etc., Montcerf, Quebec
  • Item #19717
  • Titanite, Marialite, Allanite-(Ce), Pyroxene
  • 9.7x9.5x3.8 cm
  • Largest Crystal Size: m-37mm, t-21mm
  • $60.00
  • Zec Desert
  • Montcerf
    Quebec, Canada
  • A nice plate, showing cris-crossing marialite crystals with a couple of black titanite crystals. The coating on the marialite crystals is allanite-(Ce). Nice specimen!
Marialite, Allanite-(Ce), PyroxeneGrenville, Marialite, etc., Montcerf, Quebec
  • Item #19699
  • Marialite, Allanite-(Ce), Pyroxene
  • 7.0x7.2x3.1 cm
  • Largest Crystal Size: m-41mm
  • $45.00
  • Zec Desert
  • Montcerf
    Quebec, Canada
  • A nice specimen showing a perfectly terminated prism of marialite, with a thin , partial coating of allanite-(Ce) associated with pyroxene.
TitaniteGrenville, Marialite, etc., Montcerf, Quebec
  • Item #19702
  • Titanite
  • 4.2x2.8x2.2 cm
  • Largest Crystal Size: 27mm
  • $55.00
  • Zec Desert
  • Montcerf
    Quebec, Canada
  • A razor-sharp, wedge of titanite sits upon a half crystal of titanite in this specimen. The titanite has a crazy, crystallized texture on all of its surface. Amazing! Nice titanite specimen!
MarialiteGrenville, Marialite, etc., Montcerf, Quebec
  • Item #19703
  • Marialite
  • 6.0x4.5x3.0 cm
  • Largest Crystal Size: 52mm
  • $45.00
  • Zec Desert
  • Montcerf
    Quebec, Canada
  • A stack of single and doubly terminated marialite crystals. They have the creamy white colouration with only a very light alteration to mica. Nice!
StilbiteGrenville, Marialite, etc., Montcerf, Quebec
  • Item #19704
  • Stilbite
  • 9.3x5.0x5.5 cm
  • Largest Crystal Size: 24mm ball
  • $80.00
  • Zec Desert
  • Montcerf
    Quebec, Canada
  • This specimen shows a 24mm ball of stilbite crystals atop of corroded pyroxene and feldspar crystals. Some feel that the stilbite results from crystallization of silica and other elements resulting from the decomposition of the pyroxene and feldspar by hydrothermal or meteoric aqueous solutions. Nice looking Grenville zeolite specimen!
Marialite, Allanite-(Ce), PyroxeneGrenville, Marialite, etc., Montcerf, Quebec
  • Item #19705
  • Marialite, Allanite-(Ce), Pyroxene
  • 5.4x4.2x3.3 cm
  • Largest Crystal Size: 25mm
  • $45.00
  • Zec Desert
  • Montcerf
    Quebec, Canada
  • A nice cluster of sharp marialite crystals with a slight alteration coating of allanite-(Ce). Nice!
TitaniteGrenville, Marialite, etc., Montcerf, Quebec
  • Item #19708
  • Titanite
  • 2.6x2.3x1.0 cm
  • Largest Crystal Size: 21mm
  • $35.00
  • Zec Desert
  • Montcerf
    Quebec, Canada
  • A sharp cluster of two dark-brown titanite crystals. Thumbnail sized.
Pyroxene GroupGrenville, Marialite, etc., Montcerf, Quebec
  • Item #19709
  • Pyroxene Group
  • 7.8x6.1x4.0 cm
  • Largest Crystal Size: 22mm
  • $55.00
  • Zec Desert
  • Montcerf
    Quebec, Canada
  • Maybe the best pyroxene crystal groups that I have seen from this locality!
Marialite, PyroxeneGrenville, Marialite, etc., Montcerf, Quebec
  • Item #19711
  • Marialite, Pyroxene
  • 7.8x6.1x5.0 cm
  • Largest Crystal Size: 49mm
  • $45.00
  • Zec Desert
  • Montcerf
    Quebec, Canada
  • This specimen shows a silky-creamy marialite crystal at the front of a mound of corroded pyroxene group crystals. Displays well!
TitaniteGrenville, Marialite, etc., Montcerf, Quebec
  • Item #19712
  • Titanite
  • 3.9x3.3x1.8 cm
  • Largest Crystal Size: 27mm
  • $40.00
  • Zec Desert
  • Montcerf
    Quebec, Canada
  • Two sharp titanite crystals in parallel growth make a fine specimen from this locality. Impressive!
MarialiteGrenville, Marialite, etc., Montcerf, Quebec
  • Item #19713
  • Marialite
  • 5.7x6.2x4.7 cm
  • Largest Crystal Size: 32mm
  • $35.00
  • Zec Desert
  • Montcerf
    Quebec, Canada
  • Several sharp, creamy white marialite crystals are formed at the front of this scapolite gneiss. Sharp looking specimen of this scapolite Group mineral!
Titanite, Marialite, PyroxeneGrenville, Marialite, etc., Montcerf, Quebec
  • Item #19714
  • Titanite, Marialite, Pyroxene
  • 5.5x4.3x4.6 cm
  • Largest Crystal Size: t-24mm
  • $45.00
  • Zec Desert
  • Montcerf
    Quebec, Canada
  • The top of this massive marialite matrix is covered by small pyroxene crystals and several, sharp, dark-brown titanite crystals. Excellent example!
Marialite, PyroxeneGrenville, Marialite, etc., Montcerf, Quebec
  • Item #19715
  • Marialite, Pyroxene
  • 6.0x5.0x3.0 cm
  • Largest Crystal Size: 39mm
  • $40.00
  • Zec Desert
  • Montcerf
    Quebec, Canada
  • This specimen is a nice, creamy white, singly terminated marialite crystal is thickly encrusted on the lower part by many smaller, dark-green- pyroxene crystals.
MarialiteGrenville, Marialite, etc., Montcerf, Quebec
  • Item #21575
  • Marialite
  • 9.0x5.5x4.3 cm
  • Largest Crystal Size: 66mm
  • $65.00
  • Zec Desert
  • Montcerf
    Quebec, Canada
  • A very elongated tetragonal prism of marialite leans up against some shorter crystals. The brown coating is allanite-(Ce). Interesting specimen that shows well.
Titanite, Marialite, DiopsodeGrenville, Marialite, etc., Montcerf, Quebec
  • Item #21577
  • Titanite, Marialite, Diopsode
  • 9.0x6.5x4.0 cm
  • Largest Crystal Size: t-16mm
  • $35.00
  • Zec Desert
  • Montcerf
    Quebec, Canada
  • A nice, very sharp, brown titanite crystal sits up on this wall-rock matrix covered with small diopside and marialite crystals.
Marialite, DiopsideGrenville, Marialite, etc., Montcerf, Quebec
  • Item #21579
  • Marialite, Diopside
  • 8.7x9.5x4.0 cm
  • Largest Crystal Size: m-20mm
  • $75.00
  • Zec Desert
  • Montcerf
    Quebec, Canada
  • A couple of dozen creamy-white marialite crystals are protected in a diopside crystal-lined cavity. Some have a partial coating of allanite-(Ce). Looks great!
Titanite, Marialite, DiopsideGrenville, Marialite, etc., Montcerf, Quebec
  • Item #21560
  • Titanite, Marialite, Diopside
  • 9.7x7.5x5.4 cm
  • $75.00
  • Zec Desert
  • Montcerf
    Quebec, Canada
  • An opening at the front of this specimen has had orange calcite partially dissolved away to reveal a number of very dark-brown titanite crystals on the scapolite crystals. The titanites are razor-sharp, wedge-shaped crystals. Looks good!
Marialite, Allanite-(Ce), DiopsideGrenville, Marialite, etc., Montcerf, Quebec
  • Item #21561
  • Marialite, Allanite-(Ce), Diopside
  • 10.0x5.7x5.3 cm
  • Largest Crystal Size: 87mm
  • $85.00
  • Zec Desert
  • Montcerf
    Quebec, Canada
  • A couple of elongated, prismatic marialite crystals merge together with a lump of compacted diopside crystal at the base. The crystals have allanite-Ce alteration forming a very thin veneer on the prism faces. Unique!
TitaniteGrenville, Marialite, etc., Montcerf, Quebec
  • Item #21562
  • Titanite
  • 6.3x5.3x2.0 cm
  • Largest Crystal Size: 42mm
  • $65.00
  • Zec Desert
  • Montcerf
    Quebec, Canada
  • A sharp, dark-brown titanite crystal with a little rounded diopside attached. Nice crystal!
TitaniteGrenville, Marialite, etc., Montcerf, Quebec
  • Item #21564
  • Titanite
  • 4.0x2.6x2.5 cm
  • Largest Crystal Size: as above
  • $35.00
  • Zec Desert
  • Montcerf
    Quebec, Canada
  • A larger, dark-brown titanite crystal with a smaller one attached to the front. Looks good!
Marialite, Allanite-(Ce), DiopsideGrenville, Marialite, etc., Montcerf, Quebec
  • Item #21563
  • Marialite, Allanite-(Ce), Diopside
  • 10.8x8.0x9.7 cm
  • Largest Crystal Size: 54mm
  • $85.00
  • Zec Desert
  • Montcerf
    Quebec, Canada
  • A number of sharp, singly and doubly-terminated marialite crystals scattered around a thick plate of small diopside crystals. The marialite crystals have a very thin veneer of allanite-(Ce) which give them a warm patina. Sits at an angle for perfect display.
Titanite, DiopsideGrenville, Marialite, etc., Montcerf, Quebec
  • Item #21569
  • Titanite, Diopside
  • 5.0x4.0x2.4 cm
  • Largest Crystal Size: as above
  • $65.00
  • Zec Desert
  • Montcerf
    Quebec, Canada
  • A sharp, good-looking wedge-shaped titanite crystal with a 25mm diopside crystal attached to the back. Very good example!
Phlogopite, MarialiteGrenville, Marialite, etc., Montcerf, Quebec
  • Item #21570
  • Phlogopite, Marialite
  • 8.0x4.9xz6.0 cm
  • Largest Crystal Size: phl-35mm
  • $90.00
  • Zec Desert
  • Montcerf
    Quebec, Canada
  • A very handsome specimen showing a sharp, phlogopite crystal section that is nicely perched on a marialite crystal section. When propped up, is a very nice phlogopite specimen!
Marialite, Allanite-(Ce)Grenville, Marialite, etc., Montcerf, Quebec
  • Item #21582
  • Marialite, Allanite-(Ce)
  • 12.0x7.5x4.0 cm
  • Largest Crystal Size: 67mm
  • $85.00
  • Zec Desert
  • Montcerf
    Quebec, Canada
  • The front of this specimen is largely covered by marialite crystals, mostly in parallel growth. At the top is one larger, doubly terminated marialite crystal with an allanite-(Ce) veneer from slight alteration, commonly seen in scapolite. A little pyrite on the front, too. Sorry the fluorescent photo is grainy but you get the idea! A handsome piece when propped up properly.