Lab-Grown Diamond Stocks and Companies in India

The largest Lab-Grown Diamond stocks in India by market value are International Gemological Institute (₹17,621 crore), Goldiam International (₹4,767 crore) and Renaissance Global (₹1,559 crore), at prices of 6 Nov 2026.

• International Gemological Institute: ₹407.40 | market value ₹17,621 crore | P/E 26.4
• Goldiam International: ₹316.65 | market value ₹4,767 crore | P/E 22.6
• Renaissance Global: ₹145.75 | market value ₹1,559 crore | P/E 14.3

Share price | market value | P/E, biggest first. Prices, market values and ratios at the official close of 6 Nov 2026; the score list below uses the weekly figures.

All 3 listed Indian Lab Grown Diamonds companies are named here, largest first. This is the set of companies people mean when they search for a Nifty Lab Grown Diamonds index; NSE publishes its own indices only for the largest sectors, so this equal-weighted set stands in for one. One large company cannot set the reading.

1. International Gemological Institute Limited₹17,600 cr
2. Goldiam International Ltd₹4,300 cr
3. Renaissance Global Ltd₹1,650 cr

3 Lab-Grown Diamond companies in the Lab Grown Diamonds industry group have a page on Sector Alpha, by market value as of 30 October 2026, and all 3 are listed below, largest first. The largest is International Gemological Institute (₹17,602 crore) and the smallest with a market value is Renaissance Global.

Download all 3 Lab-Grown Diamond companies (CSV)

Besides the 3 companies whose main business is lab-grown diamonds, 4 other listed companies have exposure to lab-grown diamonds, as checked on 21 October 2026: Titan, Trent, Senco Gold and Sky Gold & Diamonds. This is not their main business, so they are not counted above; the source for each is below.

• Titan also has exposure
  Opened beYon, its first lab-grown diamond jewellery brand, with a store in Mumbai on 29 December 2025.
  Source: Titan Company announcement, December 2025
• Trent also has exposure
  Sells lab-grown diamond jewellery under the Pome brand in its Westside stores, launched in October 2024.
  Source: The Hindu BusinessLine, 8 October 2024
• Senco Gold also has exposure
  Sells lab-grown diamond jewellery under its Sennes brand through a subsidiary, Sennes Fashion Ltd, set up in September 2024.
  Source: Senco Gold annual report filed with BSE, 7 August 2026
• Sky Gold & Diamonds also has exposure
  Makes gold jewellery for retail chains and sets natural, lab-grown and American diamonds in many of its pieces (annual report 2025-26).
  Source: Sky Gold & Diamonds annual report 2025-26

These companies are not in the Lab Grown Diamonds industry group, so they are not in the counts, rankings or charts on this page. Checked by hand on 21 October 2026; only a company we could prove from a filing, a company page or a named news report is listed.

The line below covers up to 5.2 years and opens on the 5Y view; the buttons cut it shorter. Over the last two years (104 weeks) this sector is 8% ahead of NIFTY 500. Earnings across its companies grew 29% on average over the last four reported quarters. It has been ahead of NIFTY 500 on a rolling three-month view for 25 weeks running.

1 of 3 companies pass the momentum test (5+ points ahead of the Nifty 500 over 3 months, within 20% of the 52-week high).

Ahead of NIFTY 500 on the three-month view for 25 weeks running; 2 of the 3 companies in the industry index above their 200-day average (no change from four weeks earlier); 1 of those 3 pass the momentum test (no change from four weeks earlier); earnings rising at 3 of the 3 that report earnings.

Ahead of NIFTY 500 for 25 weeks running, participation steady at 1 → 1 of 3. Earnings confirming, 3 of 3 members have higher trailing twelve-month earnings than a year ago.

Both lines start at 200 in the same week, so the gap between them tells the story: the sector line is an equal-weighted index of its 3 companies. The bars underneath are trailing 12-month earnings per share, one bar per reported quarter, each member set to 100 at the start and the sector taking the middle value, so a price line pulling away from flat bars means the market is paying more for the same earnings. A bar turns grey when that figure is lower than the quarter before. The rules are fixed and the same everywhere on this site: ahead by 5% or more over three months, or behind by 20% or more over a year while earnings grew 20% or more. Hover or tap any point to read both values and the gap.

Lab Grown Diamonds has done better than the NIFTY 500 by 22.6% over the last 52 weeks. Over 13 weeks the gap is a lead of 10%. International Gemological Institute Limited is the strongest against the sector itself at +4.9%. Readings are as of 30 October 2026.

Relative-strength score for the industry: 17.2 as of 30 October 2026 (consolidation, falling).

Lab Grown Diamonds has done better than the NIFTY 500 by 22.6% over 52 weeks and by 10% over 13 weeks. 1 of 3 companies we track is beating the NIFTY on relative strength (how a share price has done against the index over recent months), and 2 of 3 are ahead of the industry itself.

A score that ranks each company against the others in its industry. The four parts shown always add up to the total: Growth & earnings (35), Capital efficiency (25), Valuation (20), and Relative strength (20). Missing or old evidence affects only its own part, never as a hidden adjustment.

International Gemological Institute Limited has the strongest current balance of earnings trajectory, business quality, valuation and price confirmation, with 90% evidence confidence.

International Gemological Institute Limited has the strongest one-year price move in Lab Grown Diamonds at +17.8%. It also leads on relative strength against the NIFTY, at +23.3%. 3 of 3 companies we track are ahead of the index on that measure. Every line covers 313 weekly closes through 30 October 2026.

Price and relative strength

Price · same starting point: Every company, the sector's own index and NIFTY 500 all start level on the left edge of the window, so only the distance between the lines counts: the highest line has risen the most since then, and the chart at the top of this page is drawn the same way. It opens on one year; the buttons beside it stretch that to three or five.

RS vs NIFTY 500: How far ahead of or behind NIFTY 500 each company has been running, measured against its own recent average of that comparison, so the flat line at zero IS NIFTY 500: above it the company is beating the market, below it the market is beating the company. It opens on one year.

RS vs sector: The same measure taken against Lab Grown Diamonds itself instead of the whole market, so the flat line at zero is the sector: above it the company is beating its own peers, which is the sharper test of the two. It opens on one year.

Biggest one-year moves

Strongest against NIFTY 500

Strongest against the sector itself

This is a margin-supercharged, narrowly-driven aggregate sitting on top of record profitability. The aggregate is also concentration-narrow: IGIL drove 76.5% of the 3y Δprofit and GOLDIAM 22.7%, so this is a 2-name story, not broad participation (only ~0% of names advancing, breadth not real).

From our industry review of 14 June 2026. A newer review (10 October 2026) did not cover Lab Grown Diamonds, so this is the latest we have.

1 of 3 Lab Grown Diamonds companies held a results call for July to September 2026. International Gemological Institute guided: Indian grower reactor capacity likely to double within three years.

From the results calls for July to September 2026.

Big funds, foreign and Indian, kept their stake about the same over the last two quarters. Founders and promoters kept theirs about the same.

• Spending on new plants and equipment was ₹415 crore in the last 12 months, 3% less than a year before.
• Projects still being built grew 75% in a year.

Big funds = foreign and Indian institutions, change in their share of ownership across 3 Lab Grown Diamonds companies, in percentage points.

Ownership and spending as of 10 October 2026.

Renaissance Global Ltd has the highest Revenue among the 3 Lab Grown Diamonds companies compared here, at ₹3,062 crore. International Gemological Institute Limited is next at ₹1,458 crore. The same company also has the highest Revenue growth, at 41.4%. 3 of 3 companies report a comparable reading, the latest through Jun 2026.

What the numbers say: Renaissance Global Ltd is the largest at ₹3,062 crore, 110% ahead of International Gemological Institute Limited. Renaissance Global Ltd's growth is 41.4% from a ₹3,062 crore base, with 19 reported quarters out of the last 20. Fast growth from a smaller base is not yet the same as proven size.

What this means: Renaissance Global Ltd is both the largest and the fastest-growing company here; the growth has to turn into margin and returns before it counts as more than a fast start.

This conclusion weakens if: Renaissance Global Ltd's revenue growth slows for two consecutive comparable reports while its operating margin also compresses.

Revenue is compared on a common reported-currency basis. Growth is year-on-year, so seasonality does not masquerade as progress.

Revenue · company comparison

Revenue · largest

Revenue growth · fastest growers

All-company data · latest reported quarter

In every all-company table on this page, each figure is the company’s latest single reported quarter. The rankings above them use trailing-twelve-month or current-market values, so a company can legitimately show a different number in each.

Revenue shows both size and speed. A large company can absorb shocks and pay for wide distribution; faster growth can mean market-share gains, new capacity or stronger demand. The best sign is usually growth that lasts without hurting margins and returns.

International Gemological Institute Limited has the highest OPM among the 3 Lab Grown Diamonds companies compared here, at 61%. Goldiam International Ltd is next at 20%. The same company also has the highest Margin change, at +3 percentage points. 3 of 3 companies report a comparable reading, the latest through Sep 2026.

What the numbers say: International Gemological Institute Limited leads both opm at 61% and margin change at +3 percentage points.

What this means: International Gemological Institute Limited sets the level to compare against; the company improving fastest needs another report to confirm the change.

This conclusion weakens if: The next two comparable reports reverse the current margin change signal.

Operating margin compares operating profit with revenue. Improvement is measured in percentage points, not percentage growth.

Operating margin · company comparison

OPM · highest

Margin change · fastest expanders

All-company data · latest reported quarter

International Gemological Institute Limited has the highest Net profit among the 3 Lab Grown Diamonds companies compared here, at ₹667 crore. Goldiam International Ltd is next at ₹210 crore. Renaissance Global Ltd has the highest Profit growth at 67.7%, so level and change sit with different companies. 3 of 3 companies report a comparable reading, the latest through Sep 2026.

What the numbers say: International Gemological Institute Limited earns the most, ₹667 crore of profit over the last 12 months, 217.6% above Goldiam International Ltd. Renaissance Global Ltd shows 67.7% growth from a profit base of ₹109 crore. A fast rate from a small base matters less than a large profit that keeps coming.

What this means: International Gemological Institute Limited sets the level to compare against; the company improving fastest needs another report to confirm the change.

This conclusion weakens if: The next two comparable reports reverse the current profit growth signal.

Net profit is the residual after operating costs, interest and tax. Growth off a loss or near-zero base is excluded from the fastest-grower rank.

Net profit · company comparison

Net profit · largest

Profit growth · fastest growers

All-company data · latest reported quarter

International Gemological Institute Limited has the highest ROCE among the 3 Lab Grown Diamonds companies compared here, at 69.2%. Goldiam International Ltd is next at 25.8%. Goldiam International Ltd has the highest ROCE change at +3.6 percentage points, so level and change sit with different companies. 3 of 3 companies report a comparable reading, the latest through Sep 2026.

What the numbers say: International Gemological Institute Limited leads ROCE at 69.2%, 43.4 percentage points above Goldiam International Ltd. A high return reported once may be one good year; a high return reported year after year shows a lasting business.

What this means: International Gemological Institute Limited sets the level to compare against; the company improving fastest needs another report to confirm the change.

This conclusion weakens if: The next two comparable reports reverse the current roce change signal.

ROCE asks how much operating return the business earns on the capital employed. Direction matters, but a single exceptional year should not be mistaken for durability.

Return on capital · company comparison

ROCE · highest

ROCE change · fastest improvers

All-company data · latest reported quarter

Renaissance Global Ltd has the lowest PEG among the 3 Lab Grown Diamonds companies compared here, at 0.58×. Goldiam International Ltd is next at 0.77×. The same company also has the lowest P/E, at 15.1×. 3 of 3 companies report a comparable reading, the latest through Jun 2026.

What the numbers say: Renaissance Global Ltd has the lowest comparable PEG at 0.58×, 24.7% below Goldiam International Ltd. That would need today's multiple, the company's own history and steady growth to agree.

What this means: A low valuation is a reason to look closer at the business, not a conclusion on its own.

This conclusion weakens if: The next two comparable reports reverse the current p/e signal.

PEG is shown only when earnings are positive and three-year EPS growth is between 5% and 60%. It is worked out the same way every time, as the P/E on the last 12 months of reported earnings divided by that growth rate, never on expected earnings. On Indian companies it is shown only where the two data feeds agreed. Where any of that fails the ratio is left out rather than printed: a P/E divided by a loss, or by growth measured off a tiny base, is a number that looks precise and means nothing.

Valuation · company comparison

PEG · lowest PEG

P/E · lowest P/E

All-company data · latest reported quarter

Lab Grown Diamonds companies show up on 5 of our India lists. The most are on the multibagger study list list (1 company).

This Lab Grown Diamonds comparison names 4 specific ways its own evidence can mislead, all listed below. All 3 companies here report on comparable dates, so no rank carries a stale marker. A high growth rate can still come from a very small starting figure.

Keep these limits visible

• A high growth rate can come from a very small starting figure. The page keeps level and change separate for that reason.
• A high ROCE can be temporary, or look high because the capital base is small. It is best read beside margin, cash flow and how much is spent back on the business.
• The 4-Factor Sector Score ranks published data only. Management quality, upcoming events and risks are not part of it.
• An “all companies” line chart preserves completeness, but rank changes should be checked against reporting dates before drawing a conclusion.

This comparison is built from the reported filings of 3 Lab Grown Diamonds companies, normalized to a common ₹ scale and a shared quarter axis of up to 20 quarters each. Fundamentals run through Sep 2026 and market data through 30 October 2026.

Every company's second-feed figures reconcile against the primary source on overlapping reported periods, so nothing here is unverified or withheld.

These 23 answers restate the Lab Grown Diamonds comparison above in question form. Every one is computed from the same 3 companies and the same reported filings as the rankings and charts, current through Sep 2026. Price and relative-strength answers run through 30 October 2026. Nothing here is estimated, and none of it is a recommendation.