A 3 carat alexandrite stone weighs around 0.6 grams (0.54 gms for ratti) and is often described as Emerald in day and ruby by night time. This is because of the color-changing properties of Chrysoberyl, the mineral family an alexandrite 3 carat belongs to. Ruled by the Planet Mercury, it is associated with people born in June or under the Cancer sign. A 3 carat alexandrite stone can also be beneficial for ascendants of Leo, Gemini, Taurus, and Virgo. The 3 carat alexandrite stone price ranges between INR 1 Lakh to 5 lakh ($1206.76-$6,035.72) depending on color, clarity, cut, and origin, apart from the weight.