| Rocks and Minerals for Sale Boulangerite |
| SpiritRock Shop |
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| Rare Selenite with Boulangerite from Transylvania, Romania $39.00 |
Boulangerite is one of a few sulfide minerals that form fine acicular crystals that appear as hair-like fibers. The
fibrous aggregates may be so thick as to cover a specimen with hair-like fibers or it may be sparsely disseminated
between other minerals and may be confused with actual hairs or dark lint. Jamesonite and millerite are two other
sulfides that form similar acicular crystals and can be mistaken for Boulangerite. However, millerite is yellow and
Jamesonite has brittle crystals. Boulangerite is a sulfosalt, a segment of sulfides where the antimony acts more like a
metal than a non-metal and occupies a position where it is bonded to sulfurs. Boulangerite and Jamesonite have
been called feather ores. A variety of Boulangerite is called "plumosite" due to its plumose (feathery) habit and was
thought to be a different mineral.
• Color is blue lead gray to gray.
• Luster is either metallic or silky.
• Transparency: Crystals are opaque.
• Crystal Habits dense or sparse felted masses of acicular crystals. Also in fibrous and compact plumose masses.
• Cleavage is good in one direction parallel to the length.
• Fracture is uneven.
• Hardness is 2.5
• Specific Gravity is 5.8 - 6.2 (heavier than average for metallic minerals)
• Streak is gray to brown.
fibrous aggregates may be so thick as to cover a specimen with hair-like fibers or it may be sparsely disseminated
between other minerals and may be confused with actual hairs or dark lint. Jamesonite and millerite are two other
sulfides that form similar acicular crystals and can be mistaken for Boulangerite. However, millerite is yellow and
Jamesonite has brittle crystals. Boulangerite is a sulfosalt, a segment of sulfides where the antimony acts more like a
metal than a non-metal and occupies a position where it is bonded to sulfurs. Boulangerite and Jamesonite have
been called feather ores. A variety of Boulangerite is called "plumosite" due to its plumose (feathery) habit and was
thought to be a different mineral.
• Color is blue lead gray to gray.
• Luster is either metallic or silky.
• Transparency: Crystals are opaque.
• Crystal Habits dense or sparse felted masses of acicular crystals. Also in fibrous and compact plumose masses.
• Cleavage is good in one direction parallel to the length.
• Fracture is uneven.
• Hardness is 2.5
• Specific Gravity is 5.8 - 6.2 (heavier than average for metallic minerals)
• Streak is gray to brown.
Unique 3 piece set with 2 layered selenite shards and one "flower" shaped piece
specimens measure; 80 x 10 x 14mm, 68 x 9 x 17mm, and the "flower" is 12-14mm diameter with 18mm stem
weight for set is 22g
specimens measure; 80 x 10 x 14mm, 68 x 9 x 17mm, and the "flower" is 12-14mm diameter with 18mm stem
weight for set is 22g
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| Notice to Our Customers We will be closed from May 18th through August 15th 2012 to relocate our business. Orders placed during this time will not be shipped until after August 15th. Purchases or Reservations will be honored in the date order they are received. 1st purchaser is served 1st. |