A $400 AK-47 | Redline and a $40,000 AK-47 | Case Hardened can share the same wear rating. The difference is pattern seed — a number from 0 to 999 rolled at unboxing that determines where blue, gold, and purple land on the skin. Buying without inspecting is how traders lose thousands on mislabeled "Blue Gems" or wrong Doppler phases.
This guide covers the full inspection workflow for August 2026: Steam inspect links, in-game servers, web 3D viewers, Case Hardened tier verification, Doppler phase checks, and float precision tools.
How CS2 Inspect Links Work
Every CS2 skin listing includes a unique inspect link — a URL like:
steam://rungame/730/76561202255233023/+csgo_econ_action_preview%20S76561198...
When opened (via browser with Steam client running, or pasted into a marketplace's inspect button), CS2 launches a non-interactive 3D preview showing that exact item's float, pattern seed, StatTrak count, and sticker placement.
What inspect data reveals
| Field | What it tells you |
|---|---|
| Paint Seed / Pattern Index | Which of 1,000 pattern templates rolled (critical for Case Hardened, Fade %, Marble Fade) |
| Float Value | Wear from 0.00 (Factory New) to 1.00 (Battle-Scarred) |
| Paint Index | Skin variant ID (identifies Doppler phase, Gamma Doppler, etc.) |
| Stickers | Applied stickers with wear percentage per slot |
| StatTrak | Kill counter if present |
The +csgo_econ_action_preview (legacy CS:GO command name, still used in CS2) parameter encodes the item's asset ID, class ID, and instance ID so the client renders the precise copy — not a generic catalog image.
Limitations of default Steam inspect
- Shows the playside by default; knives require manual rotation for backside check.
- No pattern tier labels — you must cross-reference seed numbers externally.
- Stickers appear at default positions; custom sticker crafts need in-game servers.
- Cannot compare two patterns side-by-side in-browser without third-party tools.
Inspection Methods Compared
| Method | Best for | Requires CS2 installed | Pattern tier labels | Sticker positioning |
|---|---|---|---|---|
| Steam client inspect | Quick float/wear check | Yes | No | Default only |
| CS2Inspects 3D viewer | Custom crafts, combos, sticker placement | Optional (has web 3D) | No | Full customizer |
| CS2Inspects in-game servers | Holding skins in live environment | Yes | No | Custom via !g codes |
| CS2 Float Checker | Float + seed extraction | No | Partial | No |
| IsItABlueGem | Case Hardened tier lookup | No | Yes | No |
| CSGO Blue Gem | Blue Gem database + pricing | No | Yes | No |
| Broskins | Screenshot generation, crafts | No | No | Yes |
CS2Inspects — 3D Viewer and In-Game Inspect Servers
CS2Inspects is the most versatile inspect ecosystem in CS2. It combines a browser-based skin customizer, 3D viewer, and a network of community inspect servers.
Web workflow
- Paste an inspect link into the top bar, or browse skins from collections.
- Adjust Pattern ID and Float Value manually to preview variations before buying.
- Place stickers in the five slots; open Sticker Customizer for position/rotation tweaks.
- Copy the
!gcode or generate a!combocode for full loadout preview. - Use the 3D Viewer (
cs2inspects.com/3d-viewer) for browser-only inspection without launching CS2.
In-game server workflow
- Connect via the server list (e.g.,
connect mirage.cs2inspects.com) or click Connect on the site. - Select your team, open chat (not console).
- Type
!g [code]to spawn your customized skin. - Type
!i [inspectlink]to inspect any item directly from a marketplace link. - Type
!combo [code]to apply a full knife + gloves + gun setup.
This is the only method that lets you walk around with a skin, test sticker visibility at game angles, and check knife backside in first person before purchasing.
Pros and cons
Pros: Free; supports agents, knives, gloves; sticker customizer unmatched elsewhere; friends can see your craft on community servers.
Cons: Community servers can have queue times during peak hours; 3D viewer quality depends on browser GPU; no automated Blue Gem tier scoring.
Case Hardened Blue Gem Tiers — What T1/T2/T3/T4 Mean
Valve publishes no official pattern tiers. The community ranks Case Hardened skins by blue coverage on the playside (the side visible when holding the weapon). Tiers are weapon-specific — seed #661 is the AK-47 grail but looks completely different on a Karambit.
Tier definitions (community consensus, August 2026)
| Tier | Blue coverage (playside) | Price premium vs base | Example AK-47 seeds |
|---|---|---|---|
| Tier 1 | 70–100% | 5×–100×+ | 661 (Scar), 670, 321, 151, 179, 955 |
| Tier 2 | 50–70% | 3×–10× | 592, 168, 429, 387, 490, 513 |
| Tier 3 | 30–50% | 1.5×–3× | Various — check per-weapon lists |
| Tier 4 | Under 30% | Near market price | Common patterns |
Famous patterns by weapon
| Weapon | Tier 1 seed | Notable detail |
|---|---|---|
| AK-47 | #661 "The Scar" | ~98% blue top; FN StatTrak sold for $1M+ (June 2024) |
| Karambit | #387 | Near-fully-blue playside; only one FN copy exists |
| M9 Bayonet | #601, #417 | High blue concentration on blade |
| Five-SeveN | #278, #690 | Budget Blue Gem entry points ($50–$500) |
Always verify tiers for the exact weapon model — never assume a seed transfers across skins.
IsItABlueGem and CSGO Blue Gem — Pattern Verification Databases
IsItABlueGem
Paste an inspect link or enter a paint seed + weapon type. The tool returns:
- Tier classification (1–4)
- Estimated blue percentage
- Playside vs backside breakdown
- Comparable recent sales (where available)
Best for: Quick yes/no before bidding on Case Hardened listings.
CSGO Blue Gem
The longest-running Blue Gem price database. Features:
- Searchable seed index across AK, knives, pistols, and rifles
- Historical sale records for top-tier patterns
- Community-submitted screenshots per seed
- X updates at @csgobluegem
Best for: Price research on confirmed Tier 1/2 patterns before making four-figure offers.
Verification workflow before buying Case Hardened
- Copy inspect link from marketplace listing.
- Paste into IsItABlueGem — confirm tier matches seller's claim.
- Cross-check seed on CSGO Blue Gem for recent sale comps.
- Paste same link into CS2 Float Checker — confirm float and seed match listing metadata.
- Join a CS2Inspects server with
!i [link]— visually confirm playside AND backside. - Compare ask price to take.skin base Case Hardened price × tier multiplier.
Red flags: Seller shows only front-side screenshot; seed number not visible in listing; "Blue Gem" label without seed; price 2× market for unverified pattern.
CS2 Float Checker — Precision Float and Seed Extraction
CS2 Float Checker extracts exact float values (to 14+ decimal places) and paint seeds from inspect links without launching CS2.
Why float precision matters
| Scenario | Risk without precise check |
|---|---|
| Buying "0.07 FN" skin | Listing shows 0.070000 but actual is 0.069999 vs 0.079999 — different wear appearance |
| Low-float hunting (0.000x) | Marketplace may round; only inspect reveals true rank |
| Trade-up contracts | Input float affects output float calculation |
| Blue Gem + low float combo | Premium doubles; verify both independently |
CS2 Float Checker also offers trade-up calculators and inventory scanning — useful when inspecting is part of a bulk buy workflow.
Float wear brackets (CS2)
| Wear | Float range |
|---|---|
| Factory New | 0.00 – 0.07 |
| Minimal Wear | 0.07 – 0.15 |
| Field-Tested | 0.15 – 0.38 |
| Well-Worn | 0.38 – 0.45 |
| Battle-Scarred | 0.45 – 1.00 |
Critical rule: Float affects scratch density, not pattern layout. A 0.01 and 0.37 seed-661 AK have identical blue placement — only wear depth differs.
Doppler Phases and Special Finishes
Doppler skins (and Gamma Doppler, Ruby, Sapphire, Emerald, Black Pearl) are not pattern-seed dependent in the same way as Case Hardened. Instead, the paint index determines phase:
| Finish | Identification |
|---|---|
| Phase 1 | Dark blue/purple blend |
| Phase 2 | Purple dominant |
| Phase 3 | Blue dominant |
| Phase 4 | Light blue |
| Ruby | 100% red — no phase number |
| Sapphire | 100% blue |
| Black Pearl | Dark purple/black — rarest |
| Emerald (Gamma) | Green — Gamma Doppler only |
Verify phase via inspect link on CS2 Float Checker or CSFloat — the paint index field maps to phase. Never buy a "Sapphire" from screenshots alone; Ruby/Sapphire/Black Pearl command 5×–20× premiums over Phase 1–4.
Fade and Marble Fade
- Fade % — Percentage of color gradient on blade; 100% Fade commands maximum premium. Verify with dedicated Fade calculators or CSFloat.
- Marble Fade — Fire & Ice (no yellow on playside) vs standard. Seed-dependent; check community Fire & Ice seed lists.
Broskins — Screenshot and Craft Preview Tool
Broskins specializes in high-quality skin screenshots and sticker craft previews. Use it when:
- Creating listing images that show exact sticker placement
- Previewing crafts before applying expensive Katowice 2014 stickers
- Generating shareable images for trade negotiations
Broskins complements CS2Inspects — use CS2Inspects for in-game feel, Broskins for polished 2D marketing shots.
Step-by-Step: Inspect Before Every Purchase
Budget buys (under $50)
- Click inspect link in Steam or marketplace.
- Paste into CS2 Float Checker — verify float matches listing.
- Check scratch placement on playside in the preview.
- Compare price on take.skin.
Mid-tier ( $50–$500)
- All budget steps above.
- For Case Hardened: verify seed tier on IsItABlueGem.
- For Doppler: confirm phase via paint index.
- CS2Inspects in-game
!iinspect for first-person view.
High-tier ($500+)
- All mid-tier steps.
- Cross-reference seed on CSGO Blue Gem for sale history.
- Verify sticker wear percentages individually (12% vs 50% sticker wear = massive price difference).
- Check both knife sides in CS2Inspects server.
- Use Broskins or CS2Inspects for documentation before trade.
- Never skip in-game inspect for items you cannot afford to lose.
API Scam and Fake Inspect Protection
| Scam type | How it works | Protection |
|---|---|---|
| Bait-and-switch | Seller shows inspect link for item A, trades item B | Re-inspect in trade window; verify asset ID |
| Fake Blue Gem label | "Tier 1" marketing on Tier 4 seed | Always verify seed on IsItABlueGem independently |
| Float rounding | Lists 0.07 FN, actual 0.06999 vs 0.07001 borderline | CS2 Float Checker exact decimals |
| Phase mislabel | Phase 3 listed as Phase 2 | Check paint index, not screenshot color |
| API key hijack | Fake "inspect tool" requests Steam login | Use bookmarked official sites only; never enter password on third-party pages |
Enable Steam Guard Mobile Authenticator and never approve trades from inspect sessions — inspecting is read-only and should never trigger a trade confirmation.
Tool Quick-Reference
| Goal | Tool | URL |
|---|---|---|
| In-game hold + sticker test | CS2Inspects servers | cs2inspects.com |
| Browser 3D preview | CS2Inspects 3D Viewer | cs2inspects.com/3d-viewer |
| Blue Gem tier check | IsItABlueGem | isitabluegem.com |
| Blue Gem pricing history | CSGO Blue Gem | csgobluegem.com |
| Exact float + seed | CS2 Float Checker | cs2floatchecker.com |
| Screenshot/craft preview | Broskins | broskins.com |
| Live market price | take.skin | take.skin |
take.skin Verdict
Inspecting is non-negotiable for any skin where pattern, phase, or float affects price — which is most skins above $20. The August 2026 workflow is straightforward: extract data with CS2 Float Checker, verify tiers with IsItABlueGem, confirm visually on CS2Inspects servers, and price-check on take.skin.
Two minutes of inspection prevents the most expensive mistake in CS2 trading: paying a Blue Gem premium for a pattern that is not one.
