What is an I1 Natural Diamond? How Much Does It Cost Today?
Key Takeaways
- Natural diamond I1 is a diamond with I1 clarity, ranked low on the GIA scale, with inclusions clearly visible to the naked eye. However, thanks to its affordable price and natural beauty,...
Natural diamond I1 is a diamond with I1 clarity, ranked low on the GIA scale, with inclusions clearly visible to the naked eye. However, thanks to its affordable price and natural beauty, I1 diamonds are still chosen by many people who want to own diamond jewelry on a tighter budget.
In this article, you will learn more about what natural I1 diamonds are, their characteristics, prices, and whether you should buy diamonds of this clarity grade.
What is a Natural Diamond I1?
I1 diamonds (Included 1) are diamonds with visible inclusions, either inside or outside the stone, that can be seen with the naked eye without a loupe. This is the lowest grade in the I (Included) group on the GIA diamond clarity scale.
- Despite inclusions, many I1 diamonds still have good brilliance if skillfully cut.
- I1 diamonds are often suitable for users who want to own real, natural diamonds but do not prioritize absolute perfection.

I1 diamonds belong to the Included 1 group
Characteristics of I1 Diamonds
Criteria | I1 Diamond | Characteristics |
Clarity Grade | Included 1 (I1) | Lowest clarity grade on the GIA scale |
Internal Inclusions | Yes | Clearly visible to the naked eye, no loupe needed |
External Inclusions | May be present | Can affect brilliance and durability if in a critical position |
Light Reflection | Medium - Low | Can be reduced as inclusions block light passage |
Rarity | Common | Widely available on the market, easy to find |
Market Value | Low - Medium | Much cheaper than higher grades like 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 weight and color criteria |
I1 Diamond Prices Updated 2025
The price of I1 diamonds depends on various factors such as carat weight, diamond color, diamond cut, and import source. 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 budget but are not suitable for long-term investment for profit.
If you want to choose high-standard diamonds for sparkling diamond jewelry and for sustainable investment, please contact hotline 0838 353 333 or Zalo Jemmia Diamond to be assisted by experts.
Should you buy I1 diamonds?
I1 diamonds are not for everyone. Here are the pros and cons to help you easily consider:
Advantages:
- Much lower price than higher grades (VS, VVS, FL).
- Suitable for everyday jewelry with a moderate budget.
- Natural diamonds.
Disadvantages:
- Inclusions are clearly visible to the naked eye, affecting brilliance.
- Not suitable for investment purposes or for those with high demands for perfection.
- Some stones may have reduced durability if inclusions are in critical locations.
With many years of experience in the diamond industry, Jemmia wants to share with you that: If you are buying for jewelry, want to save costs, and are not too strict about clarity, I1 diamonds are a reasonable choice. However, you should buy from a reputable dealer to ensure you don't buy a stone with flaws affecting its structure.
See more: What is a Natural I2 Diamond? What is its Price Today?

Where to buy I1 diamonds reliably and with quality?
When choosing to buy I1 diamonds, you still need to ensure the origin and certification to guarantee their resale value. However, diamonds with I1 clarity are generally not chosen for high-end jewelry and long-term investment.
Typically, diamond connoisseurs often choose diamonds with a clarity of VS2 or higher.
Jemmia Diamond is a reliable address if you want to buy high 4Cs standard diamonds at reasonable prices. At Jemmia Diamond, we select diamonds with a clarity of VS2 and above, completely eliminating flaws that affect durability and structure. This ensures the quality of your jewelry and its lasting beauty.
- 100% officially imported diamonds, with full documents, invoices, and GIA certificates, guaranteed by the most competitive buy-back and trade-in policy on the market.
- Certified by high-tech machinery from GIA USA, ensuring each diamond is thoroughly evaluated.
- Only select diamonds with high 4Cs standards, free from flaws affecting durability and structure. Ensuring aesthetic appeal and suitability for jewelry.
- Public and transparent selling prices, allowing customers to easily check and compare.
- Consultants hold certifications from the Gemological Institute of America, providing thorough advice to help customers choose diamonds that meet their needs.

Jemmia Diamond's Diamond Standards: Completely eliminating flaws that affect durability and structure
Refer to: Loose Diamonds GIA with preferential prices at Jemmia Diamond
In summary, I1 diamonds are suitable for those who prioritize budget and are not overly concerned with clarity. However, due to their numerous inclusions and impact on aesthetics, these diamonds do not meet Jemmia Diamond's selection standards.
If you are looking for quality diamonds, clearly certified, and suitable for investment or high-end jewelry, please consider the ranges from VS, VVS to FL at Jemmia.