The Madeira name comes from the Brazilian word meaning ‘wood’ or ‘wood colored’. Most madeira citrine comes from heating amethyst with a brownish core to get the warm yellow or orange color. The primary sources come from the Brazilian state of Rio Grande do Sul, Uruguay, Zambia, and Madagascar.
- Optical Properties
- Characteristic Physical Properties
- Chemistry & Crystallography
Strength: Weak Fire Value: 0.013
1.544-1.553 Tolerance: very constant
Doubly Refractive (DR)
Dichroic, weak to moderate shades of yellow
Citrine is a type I clarity. Color zoning in citrine is often present in the form of "tiger stripes" or "zebra stripes". Stones may contain crystals, negative crystals, liquid inclusions, two-phase inclusions and partially-healed fractures.
silicon dioxide (aka silica)
Madeira Citrine Colors
Countries of Origin
Unknown; Uruguay; Brazil; Madagascar; Zambia
Madeira citrine was often confused with topaz before modern gemological testing.
Avoid jewelers torch.