On Offer: Pendant with center stone fashioned from the NWA 11899 Howardite HED meteorite and set in 925 Sterling Silver.

Dimensions not including bail: Approximately 13.5 mm x13.5 mm x 2.75 mm

Dimensions including bail: Approximately 23.65 mm x13.5 mm x 5.93 mm

Center Stone: Howardite

Official name: NWA 11899

Parent Body: Vesta or Vestoid

Description: Pendant with center stone fashioned from the NWA 11899 Howardite HED meteorite and set in 925 Sterling Silver. Silver Chain is available.

The HED Meteorites: The HED meteorite group is so named for the three types of meteorites that comprise the group; Howardite, Eucrite and Diogenite. The Eucrite and Diogenite are meteorites with distinct chemistries, while the Howardite is a mix of the Eucrite and Diogenite material. The HEDs are differentiated achondritic meteorites, thought to originate from the large differentiated asteroid 4 Vesta. The Vesta parent body origin for the HED clan is considered to have been conclusively established for many years. However, some leading researchers are now starting to suspect they originated from a larger Vesta-like asteroid that was blown apart long ago. This is because we also find a class of iron meteorites with the exact isotopic genetics as the HED clan, leading some researchers to conclude the HED meteorites come from a larger Vestan-like body that was in a cataclysmic collision that liberated part or all of its metal core. This hypothesis does not rule out the possibility that all of the material including Vesta and the Vestoids and the HED meteorites were once part of a much larger dwarf planet prior to this collision.

What you get: Pendant with center stone fashioned from the NWA 11899 Howardite HED meteorite and set in 925 Sterling Silver, membrane shipping/storage box, & signed Certificate of Authenticity.

* .925 Sterling Silver chain is available.

Top Meteorite offers a 100% no questions asked 30 day return policy.

SEE OFFICIAL METEORITICAL SOCIETY ENTRY BELOW

Northwest Africa 11899

Basic information

Name: Northwest Africa 11899
This is an OFFICIAL meteorite name.
Abbreviation: NWA 11899
Observed fall: No
Year found: 2017
Country: Mali
Mass: 16 kg

Classification
history:

Recommended:

Howardite

This is 1 of 356 approved meteorites classified as Howardite. [show all]
Search for other: Achondrites, HED achondrites, and Howardites

Comments:

Approved 31 Aug 2018

Writeup

Writeup from MB 107:

Northwest Africa 11899 (NWA 11899)

Mali

Purchased: 2017

Classification: HED achondrite (Howardite)

History: Purchased by Dustin Dickens from Nomad in Mali.

Physical characteristics: Many identically appearing pieces. Fusion crusted exterior. A saw cut reveals a breccia with light and dark clasts set in light-brown matrix.

Petrography: (C. Agee, UNM) This meteorite is a polymict breccia consisting of approximately 60% diogenite and 40% eucrite clasts. Accessory Fe-Ni metal, Fe-sulfide, and silica observed.

Geochemistry: (C. Agee, UNM) diogenite low-Ca pyroxene Fs_25.1±2.5Wo_3.6±2.2, Fe/Mn=30±2, n=10; eucrite low-Ca pyroxene Fs_49.7±5.2Wo_4.8±2.8, Fe/Mn=29±2, n=7;.plagioclase AN93.1±1.2, n=7.

Classification: Howardite

Specimens: 22.8 g including a probe mount on deposit at UNM, Dustin Dickens holds the main mass.

Data from:
  MB107
  Table 0
  Line 0:

Place of purchase:	Mali
Date:	P 2017
Mass (g):	16000
Pieces:	Many
Class:	Howardite
Shock stage:	high
Weathering grade:	low
Ferrosilite (mol%):	25.1±2.5, 49.7±5.2
Wollastonite (mol%):	3.6±2.2, 4.8±2.8
Classifier:	C. Agee, UNM
Type spec mass (g):	22.8
Type spec location:	UNM
Main mass:	Dustin Dickens
Comments:	Field name DD-26; submitted by C. Agee, UNM