Please refer to our separate sheet showing our policies, terms, and conditions for details.
The minimum purchase value is set at USD3,200/SGD4,300/HKD25,000 for natural gemstones and jewellery only. Purchases below the limit are subject to Joahinia Jewellery’s discretion. For lab-grown diamonds and synthetic gemstones and jewellery, minimum purchase value does not apply
We can typically deliver within 14 business days (excluding Saturdays, Sundays, and public holidays in Hong Kong) from the date we receive your advance payment, deposit, or sourcing fee. This timeframe is subject to the availability of complete jewellery information provided and confirmed by you.
Joahinia Jewellery specializes in providing professional sourcing services to our customers. Therefore, we do not offer any online purchase items. This approach helps to avoid “emotional purchases,” a common pitfall for end-users.
We will provide you with high-quality photos and/or 360-degree videos via WhatsApp to help you visualize your desired piece. We will also share relevant gemstone certificates (if applicable and available).
Lab-grown diamonds are diamonds produced in a controlled laboratory environment using advanced technological processes that replicate the natural conditions under which diamonds form deep within the Earth.
The key difference lies in their origin, not their composition or properties.
Crucially, lab-grown diamonds possess the same chemical, physical, and optical properties as natural diamonds. They are both pure carbon in a cubic crystal structure. Sophisticated gemological testing is required to distinguish between them.
Synthetic gemstones are created in a laboratory and have essentially the same chemical composition, crystal structure, and physical properties as their natural counterparts (like ruby, emerald, and sapphire).
Similar to lab-grown diamonds, the primary difference is their origin:
While they share the same fundamental properties, there can sometimes be subtle differences in trace element composition or growth patterns that expert gemologists can identify. However, to the naked eye, and often even under standard gemological equipment, high-quality synthetic gemstones can be virtually indistinguishable from natural ones.
Joahinia Jewellery, a name inspired by the floral emblems of Singapore and Hong Kong, embodies our collaborative spirit. We connect these vibrant hubs to deliver exceptional gemstones and jewellery to discerning clients worldwide.
Customs Category A Registrant:
Opec Trading Limited
Customs Registration No.:
A-B-23-09-01476
Opec Trading Limited
Unit 1304, 13th Floor,
Hermes Commercial Centre,
No. 4 Hillwood Road,
Tsimshatsui, Kowloon, Hong Kong
+852-51863438 (Natural Gemstones)
+852-46440221 (Lab-grown Gemstones)
Mondays to Fridays: 9.30am – 6.30pm
Saturdays: 9.30am – 12pm
Sundays & Public Holidays: Closed
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