Rectangular Box In Hard Ruby Zoisite Stone With Hinged Silver Vermeil.

- Rectangular box with all the exterior faces covered with adjusted ruby zoisite hard stone plates.- The bottom and interior of the box are sheathed with agate plates with a crystalline texture in light, slightly cloudy tones, the internal hinges are in solid silver gilded with gold (vermeil), the hinge is titled in hollow and engraved 800 (800/1000).- The ruby zoisite hard stone plates are composed of: - Zoisite is a mineral composed of calcium, aluminum and silicate. - Ruby is a coridon rich in aluminum oxide and traces of chromium which give it its characteristic red hue. - Hornblende is an amphibole containing calcium, magnesium, iron and aluminum, reinforcing the mineral structure of the whole. - The hard ruby zoisite stone plates have inclusions of hornblende, a mineral recognizable by its generally dark hue, often black or dark green. - This presence of hornblende enriches the composition and texture of the stone, giving it a contrasting and complex appearance. - The density of ruby zoisite varies between 3.3 and 3.5, and its hardness oscillates around 6.5 to 7 on the Mohs scale. - This relative solidity and multimineral composition make it a particularly interesting stone for jewelry and decorative objects, the ruby providing the color, the zoisite the green freshness, and the hornblende a dark and deep contrast, contributing to the aesthetics of the stone. - The main deposit of ruby zoisite is located in Tanzania in the Arusha region of East Africa. - Please note some minor chips inside and outside the box, but these do not affect the quality of the item. - Period: 3rd quarter of the 20th century, circa 1950-1975.