Hyacinth Co., Ltd

Hyacinth Co., Ltd. has been operating since 1998, giving them long-term experience in handling vintage jewelry and gemstones — a key advantage for buyers seeking consistent quality and proven sourcing. Their product range in old jewelry, stone, and opal gemstones targets niche markets where authenticity and rarity are valued. However, no work email, phone number, or business documents have been verified, which raises concerns about legitimacy and responsiveness. Buyers should request additional proof before placing large orders or sharing sensitive requirements. Being based in China offers access to a large supply of raw gemstones, but without verified contact details, it's hard to confirm real-time availability or communication. This lack of verification is common among smaller suppliers, so buyers must take extra steps to validate the business before committing.