Faceted Spinel from Myanmar (Burma) 0,3ct
Locality: Myanmar (Burma)
Weight: 0,3ct
Dimensions: 3,7 x 3,6 x 2,8 mm
Color: blue
| Category: | Faceted Spinels |
|---|---|
| Color: | Dark blue |
| Treatment: | No treatment |
Faceted Spinel – A Gemstone Mistaken for Ruby for Centuries
Natural spinel is an important gemstone mineral, valued for its color, transparency, and high hardness. Although it is now recognized as a distinct and highly sought-after gemstone, red spinel was frequently mistaken for ruby in the past. Some famous historical gemstones that were believed to be rubies for centuries were later identified as spinels.
Mineral Origin and Properties
Spinel is a distinct mineral belonging to the oxide group, with the chemical formula MgAl₂O₄. It crystallizes in the cubic crystal system and has a hardness of 8 on the Mohs scale. Thanks to its good scratch resistance and optical properties, it is widely used in jewelry.
Colors and Appearance
Spinel occurs in a wide range of colors. The best-known varieties include red and pink shades, as well as violet, purple, blue, gray, orange, and black. Its coloration is influenced by the presence of trace elements, primarily chromium, iron, and cobalt.
Cut and Quality
Faceting enhances the color and optical properties of spinel. Quality is primarily evaluated based on hue, color saturation, transparency, clarity, and cut proportions. Some specimens are exceptionally clean and transparent, while others contain natural inclusions or display less uniform coloration. These characteristics influence both the appearance and overall value of the gemstone.