good quality Uncut spinel stone raw rough synthetic spinel

(The old name is Yantai Gem Factory )is one of the largest production bases of synthetic corundum in China ,using verneuil\'s method.

We have a strong team of engineering and technical personnel and independent research and development capabilities. Our major products include rough ruby No. 1, 2, 3, 5 and 8, alexandrite, blue corundum, white sapphire in half boules,