minfind.com

Grossular (hessonite) - Jeffrey Quarry, Asbestos, Quebec, Canada

Grossular from the Jeffrey Quarry, Quebec is one of our Top 100 Minerals.

Grossular is a calcium aluminum silicate. It is a member of the garnet group which is dominated by six species: almandine, pyrope, spessartine, grossular, andradite and uvarovite. Hessonite is a cinnamon-colored gem variety of grossular.

While the main ore at the Jeffrey mine is asbestos---fibrous serpentine group minerals, such as the chrysotiles, antigorite and lizardite---the locality is primarily known to collectors as the producer of some of the world's finest and gemmiest grossular and vesuvianite. These minerals are found in a rock known as rodingite, a grossular and diopside dominant rock produced when granitic dikes hosted by iron- and magnesium-rich rocks are altered by calcium-bearing hydrothermal solutions.  At the Jeffrey mine, the main orebody is a package of ultramafic rocks and is cut by granitic dikes. It is at the contact of these two rock types that the rodingites formed during the serpentinization of the former.

Specimens of grossular from this locality are commonly associated with diopside, unusually distinct prehnite crystals and acicular pectolite.


Filter Options:
Order By:
gem GARNET var. GROSSULAR, DIOPSIDE
Jeffrey mine, Val-des-Sources (Asbestos), Les Sources RCM, Estrie, Quebec, Canada
$75
9mm x 7mm x 6mm
Prehnite
Jeffrey Mine, Val-des-Sources, Estrie, Québec, Canada
$950
40mm x 40mm x 20mm
gem GARNET var. GROSSULAR with GREEN CHROMIAN PHANTOMS, DIOPSIDE
Jeffrey mine, Val-des-Sources (Asbestos), Les Sources RCM, Estrie, Quebec, Canada
$475
26mm x 22mm x 19mm
GARNET var. GROSSULAR var. CHROMIAN, DIOPSIDE
Jeffrey mine, Val-des-Sources (Asbestos), Les Sources RCM, Estrie, Quebec, Canada
$125
44mm x 28mm x 24mm
gem VESUVIANITE var. CHROMIAN, GARNET var. GROSSULAR
Jeffrey mine, Val-des-Sources (Asbestos), Les Sources RCM, Estrie, Quebec, Canada
$80
13mm x 10mm x 13mm
Grossular
Jeffrey Mine, Val-des-Sources, Quebec, Canada
$850
45mm x 30mm x 25mm
Garnet var. Hessonite
Jeffrey Mine, Asbestos, Quebec, Canada
$135
22mm x 17mm x 11mm
GARNET var. GROSSULAR var. CHROMIAN, DIOPSIDE
Jeffrey mine, Val-des-Sources (Asbestos), Les Sources RCM, Estrie, Quebec, Canada
$55
27mm x 22mm x 17mm
gem GARNET var. GROSSULAR var. CHROMIAN, PREHNITE
Jeffrey mine, Val-des-Sources (Asbestos), Les Sources RCM, Estrie, Quebec, Canada
$1470
27mm x 23mm x 22mm
Vesuvianite
Jeffrey Mine, Val-des-Sources, Estrie, Quebec, Canada
$4800
40mm x 30mm x 20mm
gem pink GARNET var. GROSSULAR, DIOPSIDE
Jeffrey mine, Val-des-Sources (Asbestos), Les Sources RCM, Estrie, Quebec, Canada
$580
40mm x 32mm x 31mm
gem VESUVIANITE
Jeffrey mine, Val-des-Sources (Asbestos), Les Sources RCM, Estrie, Quebec, Canada
$40
13mm x 4mm x 4mm
VESUVIANITE bi-color
Jeffrey mine, Val-des-Sources (Asbestos), Les Sources RCM, Estrie, Quebec, Canada
$195
26mm x 25mm x 12mm
colorless gem GARNET var. GROSSULAR
Jeffrey mine, Val-des-Sources (Asbestos), Les Sources RCM, Estrie, Quebec, Canada
$250
36mm x 30mm x 34mm
VESUVIANITE var. MANGANOAN
Jeffrey mine, Val-des-Sources (Asbestos), Les Sources RCM, Estrie, Quebec, Canada
$280
26mm x 15mm x 13mm
Vesuvianite
Jeffrey Mine, Val-des-Sources, Les Sources RCM, Estrie, Québec, Canada
$2800
20mm x 10mm
gem PINK GARNET var. GROSSULAR
Jeffrey mine, Val-des-Sources (Asbestos), Les Sources RCM, Estrie, Quebec, Canada
$135
23mm x 21mm x 7mm
Grossular Garnet
Jeffrey Mine, Val-des-Sources, Estrie, Québec, Canada
$750
20mm x 10mm x 10mm
gem VESUVIANITE with RASPBERRY CAPS
Jeffrey mine, Val-des-Sources (Asbestos), Les Sources RCM, Estrie, Quebec, Canada
$160
30mm x 20mm x 12mm
opaque VESUVIANITE
Jeffrey mine, Val-des-Sources (Asbestos), Les Sources RCM, Estrie, Quebec, Canada
$60
14mm x 6mm x 5mm
* price is an approximate conversion and may not be accurate.

Please note that all information shown on this site may be subject to change. Information and photos are taken automatically from dealer websites and because of this errors may creep in from time to time. If there is a difference shown in price, details or availability between this site and the dealer website, you should always assume the dealer website is correct. Some of these minerals may no longer be available as our indexing of dealer websites is not real-time.

If you want to have your mineral website listed on minfind.com, click here to find out how.

Website copyright © J.Ralph and minfind.com 2009-2025. All photographs and mineral descriptions remain copyright of the mineral dealers. All Rights Reserved.