In June 2024, a single AK-47 skin changed hands for a reported one million dollars. It wasn't a special edition or a new release — it was an ordinary AK-47 | Case Hardened that happened to roll one specific number: paint seed #661, the pattern collectors call "the Scar." That sale made it the most expensive AK ever sold, and it's the perfect illustration of what a blue gem actually is.
This guide breaks down the entire blue gem system: what makes a Case Hardened a blue gem, the full pattern tier list with seed numbers, what each tier is really worth, and exactly how to check whether the AK sitting in your inventory is worth $40 or $40,000.
The #661 "Scar" Pattern
AK-47 Case Hardened #661 is the single most valuable paint seed in Counter-Strike. Collectors call it "the Scar": its play side — the receiver and magazine you see while holding the gun — is almost completely blue, interrupted only by a thin diagonal line of gold. That gold streak is the "scar" the pattern is named after. No other AK seed comes closer to a full-blue play side, which is why #661 sits alone in Tier 0, above every other blue gem on the list below.
The headline number: the one-of-a-kind StatTrak Factory New #661 sold for a reported ~$1,000,000 in 2024, making it the most expensive AK-47 — and one of the most expensive skins — ever sold. Even non-StatTrak and higher-float #661s trade in the tens of thousands, because only around 149 examples exist across all wear conditions (full rarity breakdown further down).
So if you searched "AK Case Hardened 661" or "AK Case Hardened #661", this is the answer: seed 661, nicknamed the Scar, the undisputed king of AK-47 blue gems.
What Is an AK-47 Case Hardened Blue Gem?
The Case Hardened finish uses a large blue, gold, and purple "oiled metal" texture. Where that texture lands on the gun is decided by the paint seed — a fixed number from 0 to 1000 rolled the moment the skin is created. Same skin, same wear, but the seed decides the exact color layout.
A blue gem is the community nickname for a seed whose visible play side — the receiver and magazine you see while holding the gun — is covered almost entirely in blue, with minimal gold or purple. It is not a separate skin. It's an ordinary Case Hardened that won the pattern lottery.
A few terms you'll see used interchangeably, all meaning the same 0–1000 number:
- Paint seed = pattern index = pattern ID = seed number
One key detail: blue only "counts" on the central body and the magazine. The barrel and stock don't affect a pattern's tier. That's why two AKs can both look blue at a glance but be worth wildly different amounts — collectors grade the play side specifically.
The AK-47 Blue Gem Pattern Tier List
Of the ~1000 possible seeds, only roughly 50–70 count as blue gems, and fewer than 10 reach the top tier. Here's the community-agreed tier list with the notable seed numbers in each:
| Tier | Description | Notable seed numbers |
|---|---|---|
| Tier 0 | The single best — near-total blue play side | 661 ("The Scar") |
| Tier 1 | Elite, near-full blue | 151, 179, 321, 387, 670, 955 |
| Tier 2 | Large blue coverage, some visible gold | 4, 13, 168, 429, 592, 905 |
| Tier 3 | Strong blue patches, not full blue (~50 seeds) | 555, 442, 828, 760, 139, 750, 969, 978 |
| Tier 4 | Minor blue (~80 seeds) | 2, 73, 269, 453, 470, 689, 872, 888 |
After #661, the most sought-after patterns are #151 and #955. A handy shortlist that community databases use for the notable AK gems is: 151, 168, 179, 321, 387, 555, 592, 617, 670, 760, 809, 828, 955.
Why #661 Is Worth $1 Million: Rarity Breakdown
What pushes #661 into seven figures isn't only the look — it's scarcity. Only around 149 examples of #661 exist across every wear condition, and the distribution is brutal at the top: just one StatTrak Factory New, about four StatTrak Minimal Wear, and roughly eleven non-StatTrak Factory New.
That lone StatTrak Factory New #661 is the one that sold for a reported $1M in 2024. For historical context, streamer Anomaly's StatTrak Minimal Wear #661 sold for $37,000 back in 2016 — the appreciation tells you everything about how the top of this market moves.
How Much Is an AK Blue Gem Worth?
Value is driven by three stacked factors: pattern tier, wear/float (Factory New is best), and whether it's StatTrak. Rough current ranges:
| Tier | Typical value |
|---|---|
| Regular (non-gem) Case Hardened | ~$30 (Battle-Scarred) up to a few hundred (clean Factory New) |
| Tier 4 | Usually under $1,000 |
| Tier 2–3 | Low-to-mid four figures, generally under $10,000 |
| Tier 1 (non-661) | ~$5,000 to $30,000+, with exceptional pieces above $150,000 |
| Tier 0 (#661) | Tens of thousands to ~$1,000,000 for the ST FN |
Two more factors stack on top of the pattern tier. Float matters — a low-float Factory New commands a large premium over a scratched Battle-Scarred of the same seed — and rare stickers (especially Katowice 2014 holos) applied to a gem can add thousands more, sometimes doubling the price for craft collectors.
The takeaway: a genuine blue gem carries a massive overpay over the base skin. An ordinary AK Case Hardened costs a few dollars; the exact same skin with the right seed can cost more than a house. For reference, the most expensive Case Hardened item of all is not even the AK — it's the Karambit #387 blue gem (Factory New), valued in seven figures.
How to Check if Your AK-47 Is a Blue Gem
You can check any Case Hardened in a couple of minutes:
- Get the paint seed. Every Steam Market, CSFloat, Buff163 and Skinport listing shows it; for items in your inventory, copy the Steam inspect link (right-click → Inspect in Game) and read the seed via CSFloat or a browser extension like Steam Inventory Helper.
- Run it through our free CS2 blue gem checker. Enter the seed and you get the exact blue, purple and gold percentage on the top and magazine, plus the seed's rank against all 1,001 possible patterns — the same measured values Skinport and csgoskins.gg display. It covers the Karambit, every Case Hardened knife, MAC-10, Five-SeveN and Heat Treated Deagle too.
- Cross-reference the seed against the tier list above. If it matches #661, a Tier 1, or a Tier 2 seed, you may be holding real value — then check the float and whether it's StatTrak, both of which multiply the price.
Blue Gems vs Gold Gems
The opposite of a blue gem is a gold gem — a seed where the play side is dominated by gold instead of blue. Gold gems are also collectible and command premiums, though for the AK-47 the blue gems are the more famous and generally more valuable chase. Both are simply different rare outcomes of the same Case Hardened pattern system.
Which Case Does the AK-47 Case Hardened Come From?
The AK-47 | Case Hardened is one of the original Arms Deal Collection skins, from the CS:GO Weapon Case — the very first case, released on August 14, 2013 alongside the game's original weapon-skin update. It's a piece of Counter-Strike history, which is part of why top-tier gems carry such prestige. That original case is also one of the worst cases to open today (the sealed case itself is a pricey collectible) — we cover that in our best CS2 cases to open guide.
There's a third route besides opening and buying: a trade up contract. The Case Hardened is Classified grade, so ten Restricted inputs including skins from the CS:GO Weapon Case collection give you a shot at one — and since the output's pattern index is random, a trade up is effectively a ticket in the blue gem pattern lottery. Build the contract in our CS2 trade up calculator to see the exact odds, computed float and cost before you commit real skins.
How to Safely Buy or Trade a Blue Gem
Blue gems trade for life-changing money, which makes them a magnet for scammers. If you're buying or selling one, protect yourself:
- Verify the pattern and float independently. Don't trust a seller's screenshots. Run the item's own inspect link through CSFloat or csgobluegem.com yourself and confirm the paint seed and wear match what's advertised.
- Use a reputable marketplace or broker. For four- and five-figure gems, buy through a trusted marketplace with buyer protection, or use a well-known broker with a public reputation. The biggest sales are almost always brokered rather than done as blind trades.
- Beware of "duplicate" listings. Scammers copy a real gem's images and inspect link to fake a listing. The real item is tied to a specific inventory — confirm ownership before sending anything.
- Never trade first on a promise. For high-value items, use middleman services only when both parties are verified, and never send the item ahead of payment on trust.
Are Blue Gems a Good Investment?
The top blue gems have appreciated dramatically — Anomaly's ST MW #661 went from $37,000 in 2016 to the market now valuing top pieces in the hundreds of thousands — but treat "investment" cautiously. Supply is fixed and shrinking (items get lost, traded into collections, or held for years), which supports prices, and demand for iconic patterns like #661 is genuinely global. That's the bull case.
The risks are real too: this is an illiquid, unregulated market. A six-figure skin can take months to sell, prices swing with the game's popularity and Valve's policy decisions, and your capital is locked in a virtual item on a single platform. Blue gems are best understood as collectibles you buy because you love the pattern — with potential upside — not as a reliable store of value.
Frequently Asked Questions
How do I know if my AK-47 is a blue gem?
Copy the skin's Steam inspect link, paste it into a pattern checker like CSFloat or csgobluegem.com to read the paint seed, then compare that number to the tier list. Seeds like #661, #151, and #955 are top-tier.
What is the best AK-47 Case Hardened blue gem pattern?
#661, known as "the Scar," is the single best and most valuable. After it, the top Tier 1 patterns are #151, #955, #321, #387, #670, and #179.
How much did the #661 blue gem sell for?
The one-of-a-kind StatTrak Factory New #661 sold for a reported ~$1,000,000 in 2024, making it the most expensive AK-47 ever sold.
What is a paint seed or pattern index?
It's a fixed number from 0 to 1000, assigned when the skin is created, that determines how the Case Hardened texture is laid out on the gun. It's the single factor that separates a $40 AK from a $40,000 one.
Is a blue gem a separate skin?
No. A blue gem is a regular AK-47 | Case Hardened that happens to have a rare, blue-heavy paint seed. You can't buy a "blue gem" skin — you buy a Case Hardened with a specific seed.
What are the odds of unboxing a blue gem?
Extremely low. A perfect #661 from a case is on the order of 1 in tens of millions once you combine the item odds with the exact seed. This is why almost every blue gem on the market was found by scanning existing inventories, not freshly unboxed.
The Bottom Line
A blue gem is proof that in CS2, how a skin rolled can matter far more than what it is. The AK-47 Case Hardened is the flagship: an ordinary Arms Deal skin that, with the right paint seed, becomes a six- or seven-figure collectible. If you own any Case Hardened, it's worth 60 seconds to check the seed — you might be holding a Tier 3 gem without knowing it. And if you're hunting one, use a database like csgobluegem.com and buy through a trusted marketplace where pattern and float are verified before money changes hands.
