Sunstone 18

Sunstone cabochon. Colour: Orange with a glitter effect Shape: Triangle Size: 24.40 x 19.74mm Weight in grams: 6.34g Carat weight: 31.72 carats Country of Origin: India GEMMOLOGICAL INFORMATION ON SUNSTONE Namely: The name sunstone is a trade name. Officially part of the feldspar group. In the series of plaglioclase, soda-lime or potassium. The iridescent effect is linked to the presence of inclusions: hematite, copper and goethite. Possible color: Orange to red. Rarely green. Density: Between 2.63 and 2.76 Hardness: Between 6 and 6.5 Crystal System: Triclinic Break: Irregular Cleavage: Perfect Polariscope: Anisotropic, restores every 90° Refractive index: Np: 1.533 to 1.564 / Nm: 1.536 to 1.568 / Ng: 1.542 to 1.573 Birefringence: 0.009 to 0.010 Chelsea filter: No modification Spectrum: Not observable Different countries where perhaps the sunstone is mined: Canada, India, Norway, Russia, Tanzania, United States (Oregon) SUNSTONE CAN BE CONFUSED WITH: - Aventurine quartz (aventurine) when it has an effect scintillating due to the presence of inclusions - Aventurine glass - Tinted quartzite - Fire Opal - Amber - Peach Moonstone - Carnelian