How much does a 1-carat brilliant-cut diamond cost?
Key Takeaways
- A 1-ly diamond currently costs between VND 75,000 and VND 400,000. To better understand the price, the factors affecting it, and how to choose a suitable 1-ly diamond, let's delve into the...
A 1-ly diamond currently costs between VND 75,000 and VND 400,000. To better understand the price, the factors affecting it, and how to choose a suitable 1-ly diamond, let's delve into the details with Jemmia Diamond in the article below.
How much does a 1-ly diamond cost?
The price of a 1-ly diamond ranges from VND 75,000 to VND 400,000, depending on the quality of the stone. It is often used as accent stones around the main diamond or on small jewelry pieces, without a GIA certificate.
A "ly" is a common unit for measuring diamond size, popular in Vietnam. By convention, 1 ly equals 1 millimeter (1 ly = 1mm), used to determine the diamond's size. The number of "ly" is usually calculated by diameter (for round diamonds) or length (for other cuts).
See now: Diamond prices according to the latest 2026 4Cs standards

Factors affecting the price of a 1-ly diamond
The price of a 1-ly diamond primarily depends on its quality, classified by parcel, and the uniformity of color and cut, rather than being individually priced like larger stones. According to reference price lists from the wholesale market and jewelry industry reports from early 2026, the following factors determine the price fluctuation from VND 75,000 to VND 400,000 per 1mm stone:
- Carat (weight): For very small sizes, carat makes almost no significant difference in price.
- Color: Clear white diamonds (D-F) are more expensive, while those with a yellowish or grayish tint are cheaper.
- Clarity: Diamonds with fewer inclusions have higher value; those with many blemishes or cracks are cheaper.
- Cut: The most important factor for a 1-ly diamond; a precise cut makes the stone sparkle and retain its value.
In reality, 1-ly diamonds do not have individual certificates due to their low value, but they are still influenced by the 4Cs when classified and sold in parcels.
Factors affecting the value of a 1-ly diamond
What are 1-ly diamonds typically used for?
1-ly diamonds are mainly used as melee diamonds, serving as effective accents to optimize the sparkle and aesthetic value of high-end jewelry. Due to their tiny size, they can be easily set in intricate locations where larger stones cannot be applied.
- Used as melee diamonds, set around the center stone in engagement rings and wedding bands to create a sparkling effect and enhance sophistication.
- Set on diamond rings, earrings, bracelets, and diamond necklaces to create a delicate glow, suitable for small and compact jewelry designs.
- Decorating watches and high-end accessories due to their small size, easily arranged in multiple rows to create exquisite detail.

1-ly melee diamonds can be set on
Where to buy 1-ly diamonds?
To buy quality 1-ly diamonds, you should choose authorized GIA dealers to ensure the consistent quality of melee diamonds. Jemmia Diamond is a trusted leading address, providing natural diamonds with transparent commitment to origin and legality.
- 100% Officially Imported: Diamonds at Jemmia come with complete customs invoices and certificates.
- 2% Selection Standard: Jemmia's diamond standards are on par with global standards, ensuring lasting value and liquidity for the diamonds.
- US GIA Technology: Utilizes modern machinery from the US to verify diamond quality.
- Ethical Sourcing: Adheres to the "Kimberley Process," committed to not using conflict diamonds.
- Exclusive Benefits: Offers the best buyback policy and free replacement service for 1-ly melee diamonds for customers.
Refer now: Elegant and sophisticated women's diamond rings at Jemmia Diamond
Frequently Asked Questions
Should I buy 1-ly diamonds or larger sizes for investment?
For diamond investment, choose stones from 3.6 ly or larger, as they have better liquidity and retain value more effectively.
Do 1-ly diamonds come with a certificate?
1-ly diamonds do not have certificates; only diamonds from 3.6 ly or larger come with a GIA certificate.
Do 1-ly diamonds lose value when resold?
1-ly diamonds are small in size and do not have high liquidity or investment value.
How much do lab-grown 1-ly diamonds cost?
Lab-grown 1-ly diamonds cost around tens of thousands VND per stone, significantly cheaper than natural diamonds.
Understanding the pricing standards and choosing a supplier with a transparent grading system will help you ensure the quality of the stones matches your investment cost. We hope the information on the standards and value of 1-ly diamonds has provided you with an overview before making a purchasing or jewelry crafting decision.