At CoinVerse, we’ll show you exactly how to spot this once-in-a-lifetime mint error before it slips away. 
The $500,000 Minting Disaster
Coin: 2007 Wyoming Platinum Quarter
Struck on a 1 oz platinum blank instead of a copper-nickel planchet- Weight: 31.1 g (normal quarters weigh 5.67 g)
- Believed to be 1–2 examples worldwide
- Auction estimate: $500,000+
Why so valuable?
This was a once-in-a-century U.S. Mint blunder — quarter dies used with platinum coin blanks. The mix-up created a metal rarity that could be worth more than most luxury cars.
How to Identify This Rare Platinum Quarter
Look for these 3 dead-giveaway signs:
Weight Test: 31.1 g — use a precise digital scale
Color & Luster: Brighter than silver with a watery, mirror-like shine
Edge Check: Solid platinum edge (no copper “sandwich” layers)
Pro Tip: Place it side-by-side with a regular quarter — the difference is instantly noticeable! 
Value Comparison
| Feature | Normal Quarter | Platinum Error |
|---|---|---|
| Weight | 5.67 g | 31.1 g |
| Metal Value | $0.25 | $1,000+ (platinum) |
| Collector Value | Face value | $500,000+ |
Watch Out for Fakes
Common scam signs:
“Too good to be true” eBay listings- Coins weighing ~6.25 g (these are silver, worth $50–$100)
- Claims of “many found” — false!
Only trust:
Professional grading from PCGS or NGC
Metal verification using XRF analysis
What to Do If You Find One
- Handle carefully — use cotton gloves and hold by the edges
- Weigh & photograph from multiple angles
- Submit immediately to PCGS or NGC for grading
- Sell through a major auction house like Heritage Auctions
Never clean it — a wipe could erase over $100,000 in value!
Where Could This Treasure Be Hiding?
- 2007–2008 coin rolls (especially Philadelphia Mint)
- Forgotten tip jars and cash registers
- International change — platinum coins do circulate globally
True story: A 1943 copper penny worth six figures was once found in a laundromat. This platinum quarter could be the next jackpot.
Join the Hunt!
Think you found one? Post a clear photo and weight reading in the comments — we’ll help you verify it.
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