This listing is for a 6 stone lot (~ 25 carats) of Madagascar Blue Star Sapphires. These stones are naturally mined Blue Star Sapphires. Each stone weighs ~3-5 carats, so a typical lot will be 6-7 stones, They range from mostly denim blue in color to a few being lighter or darker. Most have pretty good stars as well. The pictures were taken outside on a moderately sunny day in New York.