Lowest price:$180.90Description: min 20.10ct 20x15mm rectangular octagonal radiant cut brazilian bi-color citrine. citrine is a member of the quartz family and gets its name from its lemony color. citrine is a 7 on the mohs hardness scale making it a great choice for jewerly making. most citrine is mined in brazil but is also found in madagascar usa argentina burma(mynamar) nambia russia scotland and spain.