Cut Ruby bead necklace with Gold. The source of the deeply pinkish Ruby, as rough Ruby crystal, is Thailand, though the same sort of attractive pink-to-red Ruby colour can be found in a number of established Ruby crystal deposits, including some in Africa (Madagaskar, Namibia and Mozambique, for example).
The gemstones in the above Ruby strand are natural, not synthetic, and are all naturally included, rendering them translucent but not transparent.

Ruby and Sapphire belong to the same crystal system, Corundum, and in the gemstone world only Diamond is more tough. Ruby and Sapphire have high relative densities, making these gemstones relatively heavier than others; hefting the above Ruby strand in the hand surprises with the feel of its weight in relation to its size.
The weight of the strand in toto is 13.8 grams, the Cut Ruby bead weight just over 13 grams, or 65ct.