16.48: Malachite
- Page ID
- 4735
\( \newcommand{\vecs}[1]{\overset { \scriptstyle \rightharpoonup} {\mathbf{#1}} } \) \( \newcommand{\vecd}[1]{\overset{-\!-\!\rightharpoonup}{\vphantom{a}\smash {#1}}} \)\(\newcommand{\id}{\mathrm{id}}\) \( \newcommand{\Span}{\mathrm{span}}\) \( \newcommand{\kernel}{\mathrm{null}\,}\) \( \newcommand{\range}{\mathrm{range}\,}\) \( \newcommand{\RealPart}{\mathrm{Re}}\) \( \newcommand{\ImaginaryPart}{\mathrm{Im}}\) \( \newcommand{\Argument}{\mathrm{Arg}}\) \( \newcommand{\norm}[1]{\| #1 \|}\) \( \newcommand{\inner}[2]{\langle #1, #2 \rangle}\) \( \newcommand{\Span}{\mathrm{span}}\) \(\newcommand{\id}{\mathrm{id}}\) \( \newcommand{\Span}{\mathrm{span}}\) \( \newcommand{\kernel}{\mathrm{null}\,}\) \( \newcommand{\range}{\mathrm{range}\,}\) \( \newcommand{\RealPart}{\mathrm{Re}}\) \( \newcommand{\ImaginaryPart}{\mathrm{Im}}\) \( \newcommand{\Argument}{\mathrm{Arg}}\) \( \newcommand{\norm}[1]{\| #1 \|}\) \( \newcommand{\inner}[2]{\langle #1, #2 \rangle}\) \( \newcommand{\Span}{\mathrm{span}}\)\(\newcommand{\AA}{\unicode[.8,0]{x212B}}\)
Malachite | |
---|---|
Chemical composition | Cu2(CO3)(OH)2 |
Colors | Banded light and dark green |
Crystal system | Monoclinic |
Habit | Botryoidal, stalactitic, globular |
Cleavage | Distinct |
Fracture | Conchoidal, splintery |
Hardness | 3.5-4 |
Optic nature | Biaxial - |
Refractive index | 1.655 - 1.909 |
Birefringence | 0.254 |
Dispersion | Weak |
Specific gravity | 3.60 - 4.05 |
Lustre | Dull, silky, vitreous |
Transparency | Translucent to opaque |
Pleochroism | None |
Sources | Australia, Namibia, Russia, USA, Zambia, Zaire |
Sources
- Gemstones - Properties, identification and use (2008) - Arthur Thomas ISBN 9781845376024