Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite
Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
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Rock Hill Road, Pencoyd (West Manayunk), Lower Merion Township, Montgomery County, Pennsylvania, USAi
Regional Level Types
Rock Hill RoadRoad
Pencoyd (West Manayunk)- not defined -
Lower Merion TownshipTownship
Montgomery CountyCounty
PennsylvaniaState
USACountry

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Latitude & Longitude (WGS84):
40° 1' 30'' North , 75° 14' 20'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Mindat Locality ID:
28809
Long-form identifier:
mindat:1:2:28809:0
GUID (UUID V4):
0


Ref.: Reed, Juliet C., Annotated Bibliography of Minerals New to the Pennsylvania List - 1965-1974, Min. Soc. of PA, Inc. (1976): 70-71; Montgomery, Arthur (1969), "Revised List of PA Minerals," Mineralogy of PA, 1922-1965: 4.

Regional geology along Rock Hill and Conshohocken State Road, west of Laurel Hill Cemetery, near Merion Memorial Park. Wissahickon gneiss.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


3 valid minerals.

List of minerals arranged by Strunz 10th Edition classification

Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Halotrichite7.CB.85FeAl2(SO4)4 · 22H2O
Group 9 - Silicates
Titanite9.AG.15CaTi(SiO4)O
Schorl9.CK.05NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)
Unclassified
'Heulandite Subgroup'-(Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O
'Stilbite Subgroup'-M6-7[Al8-9Si27-28O72] · nH2O

List of minerals for each chemical element

HHydrogen
H HalotrichiteFeAl2(SO4)4 · 22H2O
H Heulandite Subgroup(Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O
H SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
H Stilbite SubgroupM6-7[Al8-9Si27-28O72] · nH2O
BBoron
B SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
OOxygen
O HalotrichiteFeAl2(SO4)4 · 22H2O
O Heulandite Subgroup(Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O
O SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
O Stilbite SubgroupM6-7[Al8-9Si27-28O72] · nH2O
O TitaniteCaTi(SiO4)O
NaSodium
Na Heulandite Subgroup(Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O
Na SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
AlAluminium
Al HalotrichiteFeAl2(SO4)4 · 22H2O
Al Heulandite Subgroup(Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O
Al SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Al Stilbite SubgroupM6-7[Al8-9Si27-28O72] · nH2O
SiSilicon
Si Heulandite Subgroup(Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O
Si SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Si Stilbite SubgroupM6-7[Al8-9Si27-28O72] · nH2O
Si TitaniteCaTi(SiO4)O
SSulfur
S HalotrichiteFeAl2(SO4)4 · 22H2O
KPotassium
K Heulandite Subgroup(Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O
CaCalcium
Ca Heulandite Subgroup(Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O
Ca TitaniteCaTi(SiO4)O
TiTitanium
Ti TitaniteCaTi(SiO4)O
FeIron
Fe HalotrichiteFeAl2(SO4)4 · 22H2O
Fe SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)

Other Regions, Features and Areas containing this locality

North AmericaContinent
North America PlateTectonic Plate

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