Let me give you an example: ในช่วงไม่กี่ปีที่ผ่านมา, the prices of gems of the same quality, regardless of coral, หยก, diamond, ancient jade, มรกต, red sapphire, alexandrite, เป็นต้น, have been rising. นอกจากนี้, with the depletion of mining sources, the rise in gem prices is still obvious. Buying gems can basically add value, แต่ […]