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Frequently Asked Questions
About Lab Grown Diamond Rings and Jewelry
Why Choose Lab Diamonds?
First, lab-grown diamonds have the same physical, chemical, and optical properties as natural diamonds, and even appraisal experts cannot distinguish them with the naked eye, so lab diamond rings possess the same sparkling beauty. Secondly, many lab-grown diamond laboratories use clean renewable energy, and the manufacturing process has a relatively small impact on the environment. Additionally, the production speed of lab diamonds is faster, more ethical, and aligns with sustainable development concepts compared to natural diamonds, which is why they are also referred to as "green diamonds." Moreover, the price of lab-grown diamonds is more affordable compared to natural diamonds, allowing consumers to purchase lab diamond rings with larger carat weights, higher clarity, and perfect cuts within a lower budget, resulting in significant savings. Therefore, more and more people are choosing lab-grown diamond rings.
What is the difference between lab grown diamonds and natural diamonds?
Laboratory diamonds have the same physical, chemical, and optical properties as natural diamonds, and their appearance is almost identical. However, the places where synthetic diamonds are formed are different. Natural diamonds are formed deep within the Earth over millions of years through high-temperature and high-pressure geological processes, while synthetic diamonds are manufactured in a controlled laboratory environment by simulating the natural high-temperature and high-pressure conditions. This manufacturing process allows synthetic diamonds to have a shorter production cycle and more controllable quality. The difference between synthetic diamonds and natural diamonds is similar to that between cultured pearls and natural pearls; they have the same composition, but they are formed in different places.
Where do synthetic diamonds come from?
Lab-grown diamonds are produced through chemical or physical processes in a controlled environment. One common method used is Chemical Vapor Deposition (CVD). In the CVD production process, carbon-containing gases are used as raw materials, and through chemical reactions in a high-temperature environment, carbon atoms are deposited on diamond seeds, gradually growing into complete diamond crystals, forming synthetic diamonds.
Are cultured diamonds real diamonds?
Man Made diamonds are 100% real diamonds, possessing the same crystalline structure and chemical composition. Synthetic diamonds have the same physical and chemical properties as natural diamonds and cannot be distinguished by the naked eye. Therefore, lab-grown diamonds are recognized as real diamonds and are considered an alternative to natural diamonds in the jewelry market. The FTC (Federal Trade Commission) states: "Synthetic diamonds have essentially the same optical, physical, and chemical properties as mined diamonds." Thus, synthetic diamonds are regarded as "real diamonds" both in Hong Kong and internationally.
What is the difference between artificial diamonds and simulated diamonds?
Cultivated diamonds and simulants (such as moissanite and cobaltite) can be visually distinguished with the naked eye. Synthetic diamonds have the same crystalline structure and chemical composition as natural diamonds, while simulants are made from other materials and do not possess the characteristics of diamonds. On the other hand, synthetic diamonds are similar to natural diamonds in terms of hardness, refractive index, and optical properties, whereas simulants cannot possess these characteristics. The relationship between natural diamonds, lab-created diamonds, and simulants is akin to that of natural pearls, cultured pearls, and plastic pearls.
Do laboratory diamonds have internationally recognized certificates?
Yes, lab-grown diamonds also come with internationally recognized GIA/IGI certificates. They provide specialized laboratory diamond certificates to verify the quality and authenticity of synthetic diamonds. These certificates include the diamond's 4C ratings, which are carat, color, clarity, and cut. Each lab-grown diamond has a report number located on its girdle, which is marked with a laser. All certified lab diamonds can be verified on the GIA/IGI website using the report number. These certificates provide consumers with credibility regarding the quality of lab-grown diamonds, enhancing their confidence in purchasing lab-grown diamond rings and jewelry.
How to distinguish cultured diamonds from natural diamonds?
The method to distinguish synthetic diamonds is mainly through professional gemological institutions for identification and certification. These institutions use advanced technology and instruments to detect the physical and chemical properties of diamonds to determine the origin and authenticity of synthetic diamonds. Additionally, laboratory diamonds are usually engraved with identification marks on the girdle of the diamond to differentiate them from natural diamonds. Since the chemical and optical properties of synthetic diamonds are essentially the same as those of natural diamonds, traditional gemological identification methods, such as diamond testers, cannot detect their differences. Identification needs to be conducted in highly specialized gemological laboratories, using very precise equipment.
Are laboratory diamonds well recognized in Hong Kong and internationally?
The acceptance of lab-grown diamonds is very high, with several international organizations recognizing their quality. Many internationally renowned jewelers also create high-end jewelry using lab-grown diamonds, establishing sub-brands for synthetic diamonds. In Western countries, lab-grown diamonds have been quite popular for some time, as the sustainable development concept of synthetic diamond brands has received support and endorsement. Lab-grown diamonds are also becoming increasingly popular in Hong Kong, and the market for lab-grown diamonds in Hong Kong shows a growing trend. Nowadays, many young people choose to propose with lab-grown diamond rings.
Are all synthetic diamonds the same?
Each lab-grown diamond is unique, as it depends on the manufacturing process and the technology of the manufacturer. Customers can choose the suitable lab-grown diamond based on their preferences and budget, and then pair it with a lab-grown diamond ring style to create the perfect lab-grown diamond ring.
About local and Japanese and Korean wedding ring styles
Is it necessary to buy a pair of wedding rings?
Our wedding bands can be purchased separately. We understand that couples may have different preferences and styles when it comes to wedding bands, and there is no requirement to purchase wedding rings from the same brand. We offer multiple wedding ring brands for customers to choose from, allowing you to select different brands and styles to create a pair of wedding rings that belong to you, solving the concerns mentioned above.
How do I know my wedding ring size?
You can refer to the ring size chart on our official website to calculate an approximate wedding ring size. Alternatively, you can visit our store, where our professional team will measure you in person to help you find the most accurate wedding ring size, allowing you to choose the most suitable local or Japanese/Korean wedding rings.
What should I do if I find out the size is not right after I buy the wedding ring?
Don't worry, all wedding rings and couple rings purchased from Diabond come with one free resizing service. We strive to ensure that the rings you buy fit both your heart and your finger.
Can I choose the material of my wedding ring?
You and your partner can choose from 10K, 14K, 18K white gold, rose gold, and yellow gold, or platinum PT900 and platinum PT950 to create your favorite style and texture in Korean and Japanese couple rings.
Can wedding rings be engraved?
All wedding rings in our store, including couple rings, come with one free engraving service. You and your partner can come together to customize a unique Japanese and Korean wedding ring, witnessing your sincere and lasting love.
Does Diabond branch have Japanese and Korean wedding rings for real try-on?
Yes, most of our Japanese and Korean couple rings have samples available for trying on. You are welcome to make an appointment to experience the unique designs of Japanese couple rings at our Tsim Sha Tsui branch and choose your favorite Japanese and Korean wedding rings. (The Causeway Bay branch does not currently offer wedding ring try-on services.)
Can I get my wedding rings immediately after purchasing them?

Our own bridal ring brand and our exclusive Japanese and Korean bridal ring collections are not mass-produced. Each ring is custom-cast based on the couple’s selected design, material, and size, and personalized engraving is available upon request. Our wedding rings are crafted with exceptional artistry, making each piece unique. Therefore, the production process requires approximately 8–10 weeks. We recommend customers allow ample time to prepare before their wedding photo shoot.

What should I do if I need wedding rings urgently due to time constraints?
We have also handled many urgent orders and understand that customers need to find wedding rings from Japan and South Korea in a hurry. Therefore, we offer an expedited service. As long as customers contact us before placing an order for the rings, our specialists will follow up on your situation and develop a suitable plan to ensure that your wedding rings are completed as quickly as possible before the deadline.