Lemon Topas Ring / new- 5.12 g - (1)

Lemon Topaz Ring / new

Set in 925 sterling silver

New and unworn

Weight: 5.12 g

13.6 mm x 13.6 mm

Ring size:

U 61
UK T
US 9.5
Fr 21
Inner diameter: 19.4 mm

New and unworn

The mineral topaz, also known under the misleading trade names Finder’s Diamond, Killiecrankie Diamond, Mogok Diamond, Saxon Diamond and Slave Diamond[6], is a commonly occurring island silicate with the chemical composition Al2[(F,OH)2|SiO4]. The fluorine (F) and hydroxide (OH) ions indicated in the round brackets can substitute for each other in the formula, but always in the same ratio to the other components of the mineral. An F-free OH-analogue is known as a synthetic compound.[7]

Topaz crystallizes in the orthorhombic crystal system and typically forms well-developed, sometimes very broad-faced crystals with short- to long-prismatic or columnar habit and a glassy luster on the surfaces. In pure form it is colorless and transparent. Through multiple light refractions due to lattice defects or polycrystalline growth it can also appear white and acquire a yellow, pinkish, brownish-red, violet, light blue and light green color from impurities, with decreasing transparency accordingly.

With a Mohs hardness of 8, topaz is a hard mineral and serves as a reference on the Mohs scale up to 10 (diamond). Like diamond, it is also brittle and, after the base plane (001), very easily cleaved with perfectly flat fracture surfaces, which is often already indicated by cleavage lines in the stone. Irregularly broken topazes tend to have rough to weakly shell-like fracture surfaces.

Shipping as insured letter