Taxation of Lab-Grown Diamonds (LGD) in India: GST & Resale Rules 2026

Lab-Grown Diamonds (LGD) are disrupting the Indian jewellery market. Offering the same chemical and physical properties as mined diamonds at a fraction of the cost, they have become a popular choice for engagement rings and luxury accessories. However, as this asset class matures, the Income Tax and GST departments have updated their frameworks to ensure parity with natural stones.

In 2026, whether you are a budget-conscious consumer or a jewellery retailer, understanding the taxation of lab-grown diamonds India is essential. While they look the same as natural diamonds, their economic lifecycle—and how you report them—requires specific care.

1. GST: Parity with Natural Stones

To avoid market confusion and tax leakage, the GST Council has historically aligned the rates for LGD with natural diamonds.

• Polished Lab-Grown Diamonds: 1.5% GST.
• Rough Lab-Grown Diamonds: 0.25% GST.
• Finished Jewellery (Set with LGD): 3% GST (on the total value of metal and stone).

Technical Tip: When buying LGD jewellery, ensure the invoice explicitly mentions "Lab-Grown" or "CVD/HPHT Diamond." This is critical for insurance valuations and for establishing the cost basis if you sell it in the future.

2. Income Tax: The Capital Asset Status

The Income Tax Act does not distinguish between "Natural" and "Synthetic" for its definition of a capital asset.

• The Status: Lab-grown diamonds are Capital Assets under Section 2(14).
• The Exemption Trap: Some sellers claim that LGD are "fashion accessories" and hence "personal effects" (tax-free). This is Incorrect. Any diamond, regardless of its origin, is a taxable capital asset.

Capital Gains Rates (AY 2026-27):

• Holding Period < 24 Months (Short Term): Taxed at your Normal Slab Rates.
• Holding Period > 24 Months (Long Term): Taxed at a flat 12.5%.
• Indexation: Not available for gemstones, including LGD.

3. Resale and Valuation Challenges

One of the key differences for LGD is their depreciating market value compared to natural stones.

• Capital Loss Strategy: If you sell your lab-grown diamond jewellery for less than what you paid for it (a common scenario for LGD), you incur a Capital Loss.
• Set-off Rule: You can set off an LTCG loss on LGD against other LTCG gains (like gains from selling gold or shares) to reduce your overall tax bill.

4. Disclosure in ITR

If your annual income exceeds ₹50 Lakhs, your lab-grown diamond collection must be disclosed.

• Schedule AL: You must report the Cost of Acquisition in the "Jewellery, bullion, etc." section of Schedule AL.
• Avoid Disparity: Do not under-report the cost just because they are "cheaper" than natural diamonds. Consistent reporting prevents future Search and Seizure targets.

Legal Reference Block

Relevant Law:

• Section 2(14) of the Income Tax Act, 1961
• HSN Code 7104 (Synthetic or reconstructed precious/semi-precious stones)
• Notification No. 1/2017-Central Tax (Rate)

Conclusion

The taxation of lab-grown diamonds India mirrors that of natural gemstones, ensuring that "a diamond is a capital asset," no matter where it was made. While LGD offer an affordable entry into the world of luxury, they come with the same compliance responsibilities—from 1.5% GST to 12.5% LTCG tax.

For a deeper comparison with traditional assets, read our guide on Diamond & Precious Stone Taxation.