Name/Title
Tourmaline var. ElbaiteEntry/Object ID
2013.1.28Description
Chemical Composition: SiO2
Crystal System: Triclinic System
Description: Common Name: Tourmaline
Chemistry: (Ca,K,Na,[])(Al,Fe,Li,Mg,Mn)3(Al,Cr, Fe,V)6
(BO3)3(Si,Al,B)6O18(OH,F)4
Group: Silicates
Location: Minas Gerais, Brazil
Description: This specimen is a cluster of large crystals with smaller clusters mixed within a course grained matrix.
Physical Charateristics:
Tourmaline is a crystal boron silicate mineral compounded with elements such as aluminium, iron, magnesium, sodium, lithium, or potassium. Tourmaline is classified as a semi-precious stone and the gemstone comes in a wide variety of colors. The name comes from the Sinhalese word "Thuramali" (??????) or "Thoramalli" (????????), which applied to different gemstones found in Sri Lanka.
Fracture: Conchoidal
Hardness: 8 Topaz
Luster: Glassy
Rock Type: Sedimentary
Specific Gravity: 2.68-2.72
Streak: WhiteCollection
RAGM Mineral CollectionAcquisition
Accession
2013.1Source or Donor
Crater Rock Museum (Misc. donors)Acquisition Method
GiftDimensions
Width
3-1/8 inDepth
3 inLength
3-1/4 inLocation
Location
Display Case
DS-10Room
Delmar Smith HallBuilding
Crater Rock MuseumCategory
ExhibitMoved By
Ian C.Date
January 22, 2025Notes
World case installationLocation
Display Case
FS-4Room
Frieda Smith HallBuilding
Crater Rock MuseumCategory
PermanentDate
August 18, 2023
