Tourmaline

Object/Artifact

-

Crater Rock Museum

Name/Title

Tourmaline

Entry/Object ID

2014.1.103

Description

Chemical Composition: SiO2 Crystal System: Hexagonal System Description: Common Name: Tourmaline var. Watermelon 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: Kunar, Afghanistan Description: 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: Igneous Specific Gravity: 2.68-2.72 Streak: White

Collection

RAGM Mineral Collection

Acquisition

Accession

2014.1

Source or Donor

Crater Rock Museum (unknown donors)

Acquisition Method

Gift

Dimensions

Width

10 in

Depth

5-1/2 in

Length

21-1/2 in

Location

Location

Display Case

FS-9

Room

Frieda Smith Hall

Building

Crater Rock Museum

Category

Permanent

Date

August 9, 2023