Jagoite

Jagoite
Image of Jagoite
General
Category	Minerals
Formula	Pb2.4Na0.2Ca0.1Fe3+0.8Mg0.2Si3.1O10Cl0.8(OH)0.2
IMA symbol	Jg
Crystal system	Hexagonal
Identification
Color	Yellow-green
Cleavage	Perfect
Fracture	Flexible
Mohs scale hardness	3
Lustre	Vitreous
Streak	Yellow
Specific gravity	5.43
Density	5.43 g/cm3
Optical properties	Uniaxial (−)
Refractive index	nω = 2.000 nε = 1.970
Birefringence	0.030
Pleochroism	none
References	[1]

Jagoite is a hexagonal-ditrigonal, dipyramidal, yellow-green lead-silicate mineral consisting of calcium, chlorine, hydrogen, iron, lead, magnesium, oxygen, silicon, and sodium. Its discovery was first published in 1957. ^[2]

Etymology

It is named after John B. Jago Trelawney, an American mineral collector. ^[3]

Properties

It is said to have a vitreous (glass-like) lustre. ^[4]

Jagoite is composed of tiny yellow crystals that span less than 0.2mm. ^[5]

Distribution

This rare mineral is located in Långban Mine, Långban Ore District, Filipstad, Värmland County, Sweden, found inside hematite ore. It is also associated with Melanotekite and Quartz. ^{[6] [7] [5]}

Media appearances

It is featured in Stardew Valley as a minor item obtained from geodes.

See also

• Nekoite
• Jamborite

References

1. "Jagoite".
2. Blix, Gabrielson, Wickman (1958). Jagoite, a new lead-silicate mineral from Långban in Sweden (2 ed.). Stockholm: Arkiv för Mineralogi och Geologi. pp. 315–317.
3. "Jagoite Mineral Data". webmineral.com. Retrieved 2025-03-12.
4. "Jagoite". www.mindat.org. Retrieved 2025-03-12.
5. Minerals, Dakota Matrix. "Jagoite mineral information and data". www.dakotamatrix.com. Retrieved 2025-03-12.
6. "Jagoite" (PDF). Handbook of Mineralogy.
7. "ATHENA MINERAL: Mineral Data; Pierre Perroud". athena.unige.ch. Retrieved 2025-03-12.