Emerald Trailer / new- 6.74 g - (1)

Emerald pendant / new Set in 925 sterling silver Weight: 6.74 g / 33.7 ct (weighed without the leather cord) 29.3 mm x 14.7 mm x 6.6 mm New and unworn Includes leather cord Emerald is a dark to light green variety of the silicate mineral beryl with the chemical composition Al2Be3[Si6O18]. The color of emerald, whose range of variations extends from a dark blue-green to a light yellow-green, is caused by small trace amounts of chromium (Cr3+) and vanadium ions (V3+). Like the pure mineral beryl, emerald also crystallizes in the hexagonal crystal system and typically forms six-sided, prismatic to columnar crystals with a glassy luster on the surfaces. Its Mohs hardness of 7.5 to 8 is comparable to that of beryl. Shipping as insured registered mail.

估價:$3.36

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