Case Hardened Blue Gem Seeds & Tiers

24 skins1000 seeds$10.08–$596.11
What is Case Hardened?

Every Case Hardened is painted by one of 1000 seeds that fix the blue, gold and purple layout. Seeds with heavy blue on the playside — "blue gems" — trade at multiples of the base skin, so the seed matters more than the wear.

Patterns: Case Hardened · Fade · Marble Fade · Doppler · Crimson Web

Per-weapon seeds AK-47Karambit

Famous blue gem seeds

Updated 2 d ago
Seed Render Skin Tier The claim Base price
#661 AK-47 (Case Hardened) — seed 661 AK-47 (Case Hardened) The Scar Pattern Tier 1 · #1 The reference AK blue gem: clean blue top with a golden "scar" at the rear sight. A StatTrak MW sold for over $400,000 in 2022; the Factory New StatTrak sold for over $1,000,000 in June 2024, the highest publicly reported skin sale. Sources: TheGamer ($1M sale) · TheGamer ($400K sale) · CSGOBLUEGEM · verified Jul 3, 2026 $178.00 Inspect
#387 Karambit (Case Hardened) — seed 387 Karambit (Case Hardened) The Blue Gem Tier 1 · #1 The most famous knife pattern in the game: a near-fully-blue playside, and the only Factory New copy in existence. A roughly $1.5M offer was declined in September 2021 ("Not interested, 1.2 is low"). Sources: BitSkins · Swap.gg · verified Jul 3, 2026 $596.11 Inspect
#442 Karambit (Case Hardened) — seed 442 Karambit (Case Hardened) Tier 1 Tier 1 with roughly 80% blue coverage on the playside; trades in the tens of thousands of dollars. Sources: Skinport · Skin.club · verified Jul 3, 2026 $596.11 Inspect
#269 Karambit (Case Hardened) — seed 269 Karambit (Case Hardened) Tier 1 Tier 1 playside blue plus unusually strong blue on the backside, which collectors value for both-sides coverage. Sources: Skin.club · CSGOSKINS.GG · verified Jul 3, 2026 $596.11 Inspect
#955 AK-47 (Case Hardened) — seed 955 AK-47 (Case Hardened) Tier 1 Tier 1 AK blue gem, one of the classic "top three" AK seeds alongside 661 and 670. Sources: CSGOSKINS.GG · verified Jul 3, 2026 $178.00 Inspect
#670 AK-47 (Case Hardened) — seed 670 AK-47 (Case Hardened) Tier 1 Tier 1 AK blue gem with heavy blue across the receiver top. Sources: CSGOSKINS.GG · verified Jul 3, 2026 $178.00 Inspect

Canon-seed rows show community per-seed screenshots (IsItABlueGem) · #955, #670 show the base finish until their captures land · Price = cheapest fee-included ask for the base skin, any seed · a documented pattern premium sits on top · How we price →

Check a seed

Seed lookup Covers the AK-47 and Karambit canon lists. Other weapons: see the per-weapon pages above. Reading your own seed: inspect the skin in game and check the paint seed line.

Blue gem tier lists

Tier Seeds Live base
AK-47 · Tier 1 661151955321387670179 $178.00$178–$507
AK-47 · Tier 2 592490513168429 same board price: seeds price case-by-case
Karambit · Tier 1 38744226932173955853902507776 $596.11$596–$1,735
Karambit · Tier 2 90569867013037566482874282453868377891798341541713661494418282327383891782721510809470179 same board price: seeds price case-by-case

AK-47 (Case Hardened): Ranked by the amount and spread of blue on the playside; Tier 1 is the most blue. (Sources: CSGOSKINS.GG). Karambit (Case Hardened): Tier 1 seeds carry the most blue on the playside of the blade; 387 stands alone with a near-fully-blue playside. (Sources: Skinport, CSGOSKINS.GG). verified Jul 3, 2026. Marked chips are the famous seeds above.

All 24 Case Hardened skins

Skin Price 30d Sold/day Markets
Karambit (Case Hardened) Covert 621/day · 28 markets $596.11 BS $596.11 – FN $1,735.26 -1.2% 621 28 Butterfly Knife (Case Hardened) Covert 1.2K/day · 29 markets $569.95 WW $569.95 – FN $1,241.08 -0.7% 1.2K 29 M9 Bayonet (Case Hardened) Covert 709/day · 27 markets $442.80 BS $442.80 – FN $1,097.00 +0.4% 709 27 Talon Knife (Case Hardened) Covert 977/day · 29 markets $347.75 BS $347.75 – FN $807.28 +1.9% 977 29 Bayonet (Case Hardened) Covert 888/day · 29 markets $213.69 BS $213.69 – FN $409.65 -2.7% 888 29 Skeleton Knife (Case Hardened) Covert 1.1K/day · 30 markets $205.98 BS $205.98 – FN $531.09 +2.7% 1.1K 30 Stiletto Knife (Case Hardened) Covert 1.1K/day · 27 markets $198.58 BS $198.58 – FN $473.79 -3.1% 1.1K 27 AK-47 (Case Hardened) Classified 1.3K/day · 32 markets $178.00 BS $178.00 – FN $506.87 +1.5% 1.3K 32 Flip Knife (Case Hardened) Covert 1.1K/day · 25 markets $150.96 WW $150.96 – FN $285.67 +3.6% 1.1K 25 Huntsman Knife (Case Hardened) Covert 509/day · 26 markets $148.01 WW $148.01 – FN $369.00 -2.5% 509 26 Nomad Knife (Case Hardened) Covert 895/day · 28 markets $138.06 BS $138.06 – FN $354.99 -8.8% 895 28 Falchion Knife (Case Hardened) Covert 752/day · 30 markets $126.94 BS $126.94 – FN $284.99 -5.6% 752 30 Bowie Knife (Case Hardened) Covert 868/day · 29 markets $123.48 BS $123.48 – FN $441.42 -2.5% 868 29 Classic Knife (Case Hardened) Covert 895/day · 28 markets $112.96 BS $112.96 – FN $280.00 0% 895 28 Ursus Knife (Case Hardened) Covert 779/day · 29 markets $103.33 BS $103.33 – FN $225.32 -1.4% 779 29 Gut Knife (Case Hardened) Covert 1.0K/day · 26 markets $88.86 BS $88.86 – FN $212.30 -2.4% 1.0K 26 Paracord Knife (Case Hardened) Covert 945/day · 30 markets $88.04 BS $88.04 – FN $186.30 +4% 945 30 Kukri Knife (Case Hardened) Covert 1.2K/day · 29 markets $87.96 BS $87.96 – FN $191.99 +1.7% 1.2K 29 Shadow Daggers (Case Hardened) Covert 590/day · 30 markets $85.88 WW $85.88 – FN $216.84 -9.7% 590 30 Survival Knife (Case Hardened) Covert 1.0K/day · 30 markets $82.84 BS $82.84 – FN $180.14 -0.9% 1.0K 30 Navaja Knife (Case Hardened) Covert 997/day · 31 markets $69.21 BS $69.21 – FN $136.00 -0.2% 997 31 Hydra Gloves (Case Hardened) Extraordinary 749/day · 31 markets $59.99 BS $59.99 – FN $357.12 -1.1% 749 31 MAC-10 (Case Hardened) Restricted 1.9K/day · 29 markets $16.27 BS $17.67 – FN $63.18 +4.8% 1.9K 29 Five-SeveN (Case Hardened) Restricted 1.4K/day · 29 markets $10.08 WW $10.08 – FN $54.24 -9.6% 1.4K 29

Price = cheapest fee-included ask for the base skin, any seed · a documented pattern premium sits on top · How we price →

How the tier system works

SteamDashboard research · verified Jul 3, 2026

Valve publishes no tiers. The game rolls a paint seed from 0–1000 at unboxing; the community (csbluegem-class databases and marketplace pattern guides) ranks the results by how much blue lands on the playside. Tier lists on this page are those published rankings, sourced and dated, not our judgment.

Seed and wear multiply. A Tier 1 seed on a Battle-Scarred body is still a blue gem, but the same seed in Factory New can be a six-figure item, because high-float and low-float copies of a given seed are separate physical supplies. The only Factory New #387 Karambit is the canonical example.

The board above prices the base skin: any seed, cheapest wear. Canon-seed listings are rare and priced case-by-case; use the inspect links to verify a seed before paying a pattern premium.

The seed is not in the item name. Check it in the in-game inspect screen and match it against the tiers above before paying a blue gem premium.

What is a blue gem?

A Case Hardened seed where the playside is mostly or fully blue. Canon lists rank 13 AK-47 seeds and 41 Karambit seeds into Tier 1 and Tier 2; #661 (AK) and #387 (Karambit) top the lists.

Which seed is the best on the AK-47?

Seed 661, the Scar Pattern: clean blue top with a golden "scar" at the rear sight. Its StatTrak Factory New copy sold for over $1,000,000 in June 2024, the highest publicly reported skin sale.

How much is the #387 Karambit worth?

There is no market price: it is the only Factory New copy in existence. A roughly $1.5M offer was declined in September 2021. Tier 1 Karambit seeds in other wears trade in the tens of thousands.

Does wear matter on a blue gem?

Yes, twice: wear prices the base skin (this board runs $10.08–$596.11 base, and the Karambit spans $596–$1,735 across wears), and rare seeds in low floats are their own scarce supply on top.

How do I check my seed?

Inspect the skin in game and read the paint seed line, or use the seed lookup above. Several markets filter listings by seed, so you can hunt specific patterns directly.