9 carat gold composition Post-stud on back 4.6 gr approx. Amethyst 0.42 ct approx. Orange citrine 0.45 ct approx. Yellow citrine 0.4 5ct approx. Pink glass 1.30 ct approx. Concrete green glass 0.45 ct approx. Concrete red glass 0.40 ct approx. Peridot 0.54 ct approx. London blue topaz 0.66ct approx.