This is evidence of the hardness of sapphire and a testament to its place at number 9 on the Mohs hardness scale. More germane to this discussion of gemstone hardness though, is the reason why sapphire and ruby (of the same family, Corundum) are so highly recommended for everyday wear je...
4892. Antique-style Aquamarine & Diamond Earrings 4893. 14k Yellow 2.5 Mm Childrens Missile Earrngs 4894. Titanium Bevel Edge 6mm Brush/polish Band - Sizing 11.5 4895. 14k Twl-tone 3 Stone 1 Ct Diamond Ring 4896. Genuine Silver Cz Alphabet Charm Letter D - 3/8 Inch 4897. 14k Two-tone...