- HT jewelry Co. Ltd
- created gemstons,grown clombia emerald,created alexandrite,lab created emerald,synthetic ruby,corumdum,aquamarine,lab created emerald.
- Address:Charon Krung Road
- Gemexpert Co., Ltd.
- semi precious, lab grown.
- Address:50/29 Pan Rd, Bangkok, Silom,Bangrak, Thailand
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