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Aerinite

• 
  Soriana Quarry, Estopiñán del Castillo, Huesca, Aragón, Spain
  © David Soler

• Formula:
  (Ca_5.1Na_0.5)(Fe³⁺,Al,Fe²⁺,Mg)₄(Al,Mg)₆[HSi₁₂O₃₆(OH)₁₂][(CO₃)_1.2(H₂O)₁₂]

• System: Monoclinic

• Name:
  From the Greek "aerinos," for sky-blue, alluding to its color.

• IMA Status: Valid (Approved)

• Type Locality:
  Caserras del Castillo, Estopiñán del Castillo, Huesca, Aragón, Spain

• Dana 8th: 68.1.3.1
  
  68 : INOSILICATES Structures with Chains of More Than One Width
  1 : Structures with Chains of More Than One Width

• Strunz 9th:
  9.DB.45
  
  9 : SILICATES (Germanates)
  D : Inosilicates
  B : Inosilicates with 2-periodic single chains, Si2O6; Pyroxene-related minerals

• Hardness (Mohs): 3

• Diapheny: Transparent

• Colour: blue to blue-green

• Streak: bluish white