What is an I1 natural diamond? How much does it cost now?
Natural I1 diamond is a diamond with I1 clarity, belonging to the lower group on the GIA scale, with obvious inclusions visible to the naked eye. However, thanks to its reasonable price and natural beauty, I1 diamonds are still chosen by many people who want to own diamond jewelry on a more budget-friendly basis.
In this article, you will learn more clearly about what natural I1 diamonds are, their characteristics, price range, and whether you should buy diamonds of this clarity grade.
What is a natural I1 diamond?
An I1 diamond (Included 1) is a type of diamond with obvious inclusions, either inside or outside the stone, that can be seen with the naked eye without a loupe. This is a grade in the I (Included) group - the lowest grade on the diamond clarity scale of GIA.
- Despite having inclusions, many I1 diamonds still have good brilliance if they are cut skillfully.
- I1 diamonds are often suitable for users who want to own real, natural diamonds but do not place too much emphasis on absolute perfection.

I1 diamonds belong to the Included 1 group
Characteristics of I1 diamonds
Criteria | I1 diamond | Characteristics |
Clarity group | Included 1 (I1) | Belongs to the lowest clarity group on the GIA scale |
Internal inclusions | Yes | Can be clearly seen with the naked eye, no loupe needed |
External blemishes | May be present | May affect brilliance and durability if located in important positions |
Light reflection ability | Medium - Low | May be reduced because inclusions block light from passing through |
Rarity | Common | Frequently found on the market, easy to purchase |
Market value | Low - Medium | Much cheaper than higher grades such as VS, VVS, FL |
Investment/collecting potential | Low | Not suitable for long-term investment, mainly used for common jewelry |
Common certifications | GIA, IGI | Can still be certified if meeting sufficient criteria for weight and color |
I1 diamond price updated for 2025
The price of I1 diamonds depends on many factors such as diamond carat, diamond color, diamond cut, and import origin. Below is a reference price list on the market:
Size | Clarity grade | Color grade | Selling price (VND) |
4ly5 | I1 | G | ~18.500.000 |
5ly | I1 | F | ~29.700.000 |
5ly4 | I1 | E | ~41.000.000 |
6ly | I1 | D | ~78.300.000 |
6ly3 | I1 | D | ~92.800.000 |
Note: The diamond prices above are updated according to the 2025 market and may change over time. I1 diamonds are suitable for those who want to save on budget; however, they are not suitable for investment for long-term profit.
If you want to choose high-standard diamonds for sparkling diamond jewelry and long-term sustainable profitable investment, please contact hotline 0838 353 333 or Zalo Jemmia Diamond for expert support.
Should you buy an I1 diamond?
I1 diamonds are not for everyone. Below are the pros and cons to help you consider more easily:
Advantages:
- Much lower price than higher grades (VS, VVS, FL).
- Suitable for everyday jewelry with a moderate budget.
- It is a natural diamond.
Disadvantages:
- Inclusions may be clearly visible to the naked eye, affecting sparkle.
- Not suitable for investment purposes or for people with high standards for perfection.
- Some stones may have reduced durability if inclusions are located in important positions.
With many years of experience in the diamond industry, Jemmia would like to share with you that: If you buy to wear as jewelry, want to save costs, and are not too strict about clarity, an I1 diamond is a reasonable choice. However, you should choose a reputable seller to ensure you do not buy a stone with defects affecting its structure.
See more: What Is a Natural I2 Diamond? How Much Does It Cost Nowadays?

Where to buy reputable and quality I1 diamonds?
When choosing to buy an I1 diamond, you still need to ensure its origin and certification to guarantee its value after resale. However, diamonds with I1 clarity are usually not chosen for high-end jewelry and long-term investment.
Normally, diamond-savvy buyers often choose diamonds with clarity from VS2 and above.
Jemmia Diamond is a trustworthy address when you want to buy diamonds with high 4Cs standards at a reasonable price. At Jemmia Diamond, the clarity standard is from VS2 and above, completely eliminating defects that affect durability and structure. Ensuring the quality of jewelry and lasting value for you.
- 100% officially imported diamonds, with full documents, invoices, and certificates from GIA, guaranteed by the most competitive buyback - trade-in policy on the market.
- Inspected with high-tech machinery from GIA USA, ensuring each diamond is thoroughly evaluated.
- Only selecting diamonds with high 4Cs standards, with no defects affecting durability or structure. Ensuring aesthetics and suitability for jewelry use.
- Public and transparent pricing, supporting customers to look up and compare easily.
- Consultants certified by the Gemological Institute of America, providing thorough advice to help customers choose diamonds that suit their needs.

Jemmia Diamond standards: Completely eliminating defects that affect durability and structure
Reference: Loose diamonds with GIA certificates at preferential prices at Jemmia Diamond
In summary, I1 diamonds are suitable for those who prioritize budget and are not too strict about clarity. However, due to having many inclusions and affecting aesthetics, this diamond line is not within Jemmia Diamond's selection standards.
If you are looking for quality diamonds, clearly certified and suitable for investment or luxurious jewelry, please refer to the lines from VS, VVS to FL at Jemmia.