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Albite  | | | | Description: | EDS analysis by Kerry Day (2008) showed this plagioclase mineral to be near end member albite. | | Reference: | [P Cristofono collection ] |
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Allanite-(Ce) ? | | {CaCe}{Al | | Fe | | }[O|OH|SiO | | |Si | | O | | ] |
| | | Reference: | [T Mortimer collection] |
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Apatite-(CaF) | | | | Colour: | blue-green, green | | Fluorescence: | white, SW | | Reference: | [P. Cristofono collection] |
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Calcite | | | | |
'Chalcedony' | | | | Habit: | botryoidal | | Colour: | blue, purple | | Description: | Occurs in quartz veins. | | Reference: | [T. Mortimer, Nashua Min. Soc. Display Cat., 1995] |
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Chalcopyrite | | | | Description: | Associated with galena and sphalerite in a quartz vein. | | Reference: | [P Cristofono collection] |
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Chamosite | | | | Colour: | dark green | | Description: | EDS analysis by Kerry Day, 2008. | | Reference: | [P Cristofono collection ] |
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Clinozoisite | | | | Habit: | prismatic | | Colour: | pale green, gray, colorless | | Reference: | [P. Cristofono collection; T. Mortimer collection; D. Swenson collection] |
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Clinozoisite
var: Clinothulite | | | | Colour: | pink | | Description: | Qualitative SEM-EDS by Kerry Day:
Al (1.49 KeV) = 1221; Si (1.74) = 1459; Ca (3.69) = 1016; Mn (5.90) = 33; Fe (6.40) = 51; Background values 2/10 = 85/9
"Zoisite/Clinozoisite/Thulite. The smallest amount of Mn can colour an Epidote Group mineral cherry red."
Clinozoisite is very common at Joppa Hill, usually pale green, sometimes colorless, very rarely pink. Zoisite does not occur at the locality. "Thulite" = Mn-bearing zoisite. "Clinothulite" = Mn-bearing clinozoisite. | | Reference: | [P Cristofono collection, 2008] |
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Covellite | | | | |
Diopside | | | | Habit: | good crystals in calcite | | Colour: | green | | Fluorescence: | none | | Reference: | [P Cristofono collection] |
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Ferrohornblende | | | | Habit: | Dark green bladed crystals which sometimes look like "actinolite." | | Colour: | dark green | | Fluorescence: | none | | Reference: | [Tom Mortimer, pers. comm. 2005] |
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Galena | | | | Habit: | no crystals seen | | Colour: | metallic gray | | Fluorescence: | none | | Description: | Occurs with sphalerite in quartz vein. | | Reference: | [P Cristofono collection] |
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Goethite | | | | |
Grossular  | | | | Habit: | good crystals | | Colour: | cinnamon-brown, tan, red | | Description: | Note: Lighter colored garnets from Joppa Hill have long been called grossular. A darker red garnet was analyzed by SEM-EDS and found to be grossular as well. Ca>Fe>Mn. (P. Cristofono specimen, analysis done by Kerry Day, 2008.) | | Reference: | [P. Cristofono collection] |
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Grossular
var: Hessonite | | | | Habit: | good crystals occur in quartz and calcite | | Colour: | cinnamon brown, yellow-brown | | Reference: | [P Cristofono collection] |
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Hematite | | | | Habit: | massive | | Colour: | red | | Description: | Occurs in quartz vein. | | Reference: | [P Cristofono collection] |
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'K Feldspar' | | | | Colour: | white | | Description: | 1 mm subhedral white crystals in massive grossular were found by EDS analysis (Kerry Day, 2008) to be microcline or orthoclase. | | Reference: | [P Cristofono collection ] |
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Malachite | | | | Habit: | no crystals observed | | Colour: | green | | Description: | Rare, associated with chalcopyrite in quartz vein | | Reference: | [P Cristofono collection] |
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'Manganese Oxides
var: Manganese Dendrites' | | | | |
Pargasite ? | | [Na][Ca | | ][Mg | | Al][(OH) | | |Al | | Si | | O | | ] |
| | | Reference: | [Hitchcock, Charles H. (1877): Geology of New Hampshire, Vol.II.] |
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Pyrite | | | | Habit: | cubic crystals, commonly altered | | Colour: | brassy | | Fluorescence: | none | | Reference: | [P Cristofono collections] |
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Quartz | | | | |
Quartz
var: Milky Quartz | | | | Reference: | [P. Cristofono collection] |
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'Scapolite' | | | | Habit: | good crystals rare | | Colour: | white | | Description: | Common in Bedford boulders. | | Reference: | [P Cristofono collection.] |
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Scheelite | | | | Habit: | massive | | Colour: | white | | Fluorescence: | bright blue-white (SW) | | Reference: | [P Cristofono collection] |
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Sphalerite | | | | Habit: | usually massive | | Colour: | gray, pale brown | | Description: | Occurs with galena in quartz vein | | Reference: | [P Cristofono collection] |
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Sphalerite
var: Cleiophane | | | | Colour: | pale tints | | Description: | SEM-EDS analysis, 2009. Iron-free sphalerite, ZnS. | | Reference: | [P Cristofono collection] |
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Titanite | | | | |
Vesuvianite | | | | |
