Wandering Star Meteorites
Howardite Meteorites
Howardites are a group of polymict-breccia achondrites that seems to represent a mixture of Eucrite and Diogenite.
The primary minerals found in Howardites are pyroxene (largely orthopyroxene) and Na-poor plagioclase.
A small portion of the howardite class have been found to be rich in solar-wind noble gases and classified as regolith breccias.
Scientific evidence suggests the Asteroid 4 Vesta is the source of this material.
NWA 5513 - Howardite $16.00 per gram
This is one of the nicest Howardites I have seen recently. Very nice fusion crust and an interior that lets you know you are holding a rock from space.
There is not much of this available.
Name: Northwest Africa 5513
This is a PROVISIONAL name.
Abbreviation: NWA 5513
Observed fall: No
Year found: unknown
Country: (Northwest Africa)
Mass: 230 g
Fieldname: Bunch 1266
Purchase or find date: 10/08
Pieces: 4
Specimens: 23.1
Description: HOW
Info: NAU/Esparza/Bunch
Name assigned to: Ted Bunch
Date assigned: 2008-12-10
Assigned by: C. Smith
19.9 gram fragment with primary and secondary fusion crust
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5 gram fragment with fusion crust
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This is one of the nicest Howardites I have seen recently. Very nice fusion crust and an interior that lets you know you are holding a rock from space.
There is not much of this available.
Name: Northwest Africa 5513
This is a PROVISIONAL name.
Abbreviation: NWA 5513
Observed fall: No
Year found: unknown
Country: (Northwest Africa)
Mass: 230 g
Fieldname: Bunch 1266
Purchase or find date: 10/08
Pieces: 4
Specimens: 23.1
Description: HOW
Info: NAU/Esparza/Bunch
Name assigned to: Ted Bunch
Date assigned: 2008-12-10
Assigned by: C. Smith
19.9 gram fragment with primary and secondary fusion crust
_______________________________________________________
5 gram fragment with fusion crust
_____________________________________________________________
Northwest Africa 1929
Find: May 2003
Location: Morocco
Classification: Achondrite (howardite)
History: A 922.2 g, partially crusted, complete stone was purchased in Erfoud, Morocco, in May 2003.
Petrography: (T. Bunch and J. Wittke, NAU ) A breccia of 72 vol% cumulate eucrite clasts, 8% subophitic clasts, 14% diogenites, and 6% melt clasts. Pervasive solid-state recrystallization of plagioclase and pyroxenes with localized melt pockets and veins in clasts.
Geochemistry: Coarse-grained gabbroic eucrite: Pyroxene (Fs45–40Wo7–20); plagioclase (An91.2–95.3); metal (Ni = 0.97; Cr = 0.87 [both wt%]). Diogenite: Pyroxene (Fs43–54Wo2.5–3.6; Fe/Mn = 36, 37).
Classification: Achondrite (howardite); high shock.
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DaG 881
Classification: Howardite
Found: November, 2000
Country: Libya
Mass: 86 g
A crusted stone of 86 g was found by a private collector in the Dar al Gani desert. Mineralogy and classification (A. Burroni and L. Folco, MNA-SI): polymict breccia; clasts (up to several mm in size) interspersed in a fragmental matrix include: 1) fine-grained basaltic eucritic clasts; 2) medium-grained cumulate eucritic clasts (mostly pigeonite En58Wo6 and calcic plagioclase); 3) dark, quench-textured clasts with microporphyritic pigeonite crystals set in cryptocrystalline or glassy matrix; 4) large (up to 1.5 mm in size) single-crystal fragments of low-Ca pyroxene of diogenitic origin (En70Wo3). The rock is cross-cut by discrete shock melt veinlets up to 0.25 mm thick.
DaG 881 1.7 gram part slice (Not for sale)
DaG 881
Classification: Howardite
Found: November, 2000
Country: Libya
Mass: 86 g
A crusted stone of 86 g was found by a private collector in the Dar al Gani desert. Mineralogy and classification (A. Burroni and L. Folco, MNA-SI): polymict breccia; clasts (up to several mm in size) interspersed in a fragmental matrix include: 1) fine-grained basaltic eucritic clasts; 2) medium-grained cumulate eucritic clasts (mostly pigeonite En58Wo6 and calcic plagioclase); 3) dark, quench-textured clasts with microporphyritic pigeonite crystals set in cryptocrystalline or glassy matrix; 4) large (up to 1.5 mm in size) single-crystal fragments of low-Ca pyroxene of diogenitic origin (En70Wo3). The rock is cross-cut by discrete shock melt veinlets up to 0.25 mm thick.
DaG 881 1.7 gram part slice (Not for sale)
