BMC - Branded • Malaysia • Customize. BMC Expert is the best moissanite diamond expert in Malaysia. We create high-end diamond jewellery for our clients with ethical and responsible practices. Our diamond is original with GRA certification and USA black Card code. We use the sparkling moissanite, that is said to be a gemstone born from the stars. At BMC, we have a team of skilled craftsmen that are proficient in creating custom jewellery pieces that you desire. Apart from creating custom designs, we at BMC also boast a sparkling collection of jewellery you can purchase.