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 Binghamite - AKA American Pietersite Rough - $12.50/pound
Locality: Minnesota

Binghamite is often called American Pietersite because it has chatoyance like tiger eye and can look similar to pietersite. Binghamite is quite rare and the beautiful and unusual stones cut from it sell themselves. A high iron content gives Binghamite its beautiful red and golden colors. Similar to the famed Australian Marra Mamba Tiger Eye, Binghamite may also contain hematite. This material cuts and polishes similar to other materials in the tiger eye family.

Binghamite takes a good polish with tin oxide, cerium oxide or diamond. Mohs hardness 6.5 to 7.0.


Sample of Rough Binghamite - AKA American Pietersite from Minnesota




Stones cut from Binghamite
Item Number
Description
Weight
Price
Binghamite#1
Three piece parcel of triangular shapes measures approximately 3-1/4" x 2-1/4" x 1-3/8 to 7/8" at the thickest point, 2-3/4" x 1-3/4" x 1-1/4" at the thickest point and 2" x 1" x 1" at the thickest point.
0.86 pounds
$10.75
Binghamite#2
Two piece parcel of triangular shapes measures approximately 4" x 2-1/4" x 1-3/8 to 7/8" thick and 3" x 2-1/2" x 1-3/4" at the thickest point.
1.24 pounds
$15.50
Binghamite#3
Two piece parcel measures approximately 3" x 2-3/8" x 1-3/8" at the thickest point and 2-1/2" x 1-1/2" x 1-5/8" at the thickest point.
1.02 pounds
$12.75
Binghamite#4
Two piece parcel measures approximately: triangular shape at 3-7/8" x 2-3/4" x 1-1/4" at the thickest point and 2-1/2" x 2-3/8" x 1-1/2" at the thickest point.
1.49 pounds
$18.63
Binghamite#5
Two piece parcel of triangular shapes measures approximately 3" x 2" x 2" at the thickest point and 4" x 2" x 1-3/4 to 1" thick.
1.31 pounds
$16.38
Binghamite#6
Measures approximately 3-1/2" x 3-1/4" x 1-5/8" at the thickest point.
1.06 pounds
$13.25
Binghamite#7
Triangular shape measures approximately 4-1/2" x 3-1/2" x 1-5/8" at the thickest point.
1.17 pounds
$14.63
Binghamite#8
Two piece parcel measures approximately 2-1/2" x 2-3/8" x 2 to 1-5/8" thick and 2-5/8" x 2-3/8" x 1 to 1/2" thick. SOLD
1.62 pounds
$20.25
Binghamite#9
Measures approximately 5" x 3-3/4" x 3" at the thickest point. SOLD
2.43 pounds
$30.38
Binghamite#10
Triangular shape measures approximately 4-1/2" x 4" x 3-1/2 to 2-1/2" thick. SOLD
3.70 pounds
$46.25

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