Species: Natural Tourmaline Variety: Bi-color tourmaline Weight: 6.30 crt Measurements: 17.48x7.32x5.42 Color: Green/ intense yellow Transparency: transparent Cut: modified octagon step cut Treatment: no indication of treatment Laboratory report/number: 27073119 Shipping method:fast shipping with UPS or DHL with tracking number if there are any customs duties the customer will pay them . Original certificate report will be sent with stone .