How to Clean a Tarnished Watch Bracelet Without Scratching Metal
A metal-by-metal method for lifting tarnish off a watch bracelet, plus the household fixes that scratch soft precious metal.
American Eagle Gold Grading: How Gold Eagles Are Graded, Labeled and Valued
How American Gold Eagles are graded on the 70-point scale by PCGS and NGC, what MS70, PF70 and SP mean on a slab, why most bullion coins trade on gold content while proofs, burnished coins and key dates can carry grade premiums, plus costs, release labels and fake-slab checks.
Pearl Grading Explained: AAA Letters, GIA’s 7 Factors and Tahiti’s A-D
Pearl grading has no single universal scale. A seller’s AAA means whatever that seller says it means, GIA describes pearls by seven value factors, and French Polynesia sorts Tahitian pearls from Top Gem down to D. Here is how each system works, what the FTC requires on labels, and which lab report to ask for.
IGI vs GIA: What Each Diamond Lab Reports for Natural and Lab-Grown Stones
GIA and IGI both grade natural diamonds on the 4Cs, but they now part ways on lab-grown stones: GIA issues only Premium or Standard, IGI keeps letter grades. Who runs each lab, what their reports say, how to verify a report number, and what a report does not promise.
Diamond Color Scale: GIA’s D-to-Z Grades and What You Can Actually See
GIA’s D-to-Z diamond color scale has 23 letter grades in five ranges, from colorless D to lightly tinted Z. See how labs grade color face-down against masterstones, why one grade is hard to spot, how the metal changes the look, and where fluorescence, fancy colors and lab-grown stones fit.
Diamond Clarity Chart: GIA’s 11 Grades From FL to I3, Explained
GIA grades diamond clarity on 11 steps, from Flawless to I3, judged at 10x magnification. Here is the full chart, the inclusions graders look for, what eye-clean really means, the FTC rules on calling a stone flawless, clarity treatments, and how lab-grown diamonds are described now.
First Strike vs Early Releases: What PCGS and NGC Release Labels Really Mean
PCGS First Strike, NGC Early Releases and First Releases, and First Day of Issue explained from the services’ own rules: the 30-day windows, how release dates and cutoffs are set, the $18 label fees, the 2006 lawsuit over the old First Strikes name, and why the label speaks to timing, not quality.
How to Spot a Fake Coin Slab: Cert Lookups, Holder Features and Red Flags
Counterfeit and tampered coin holders copy real PCGS and NGC certification numbers, so a number that looks up is only the first check. How to verify a slab with each service, match the record to the coin, use the NFC chip and QR hologram, and what to do if a holder fails.
Coin Grading Apps: What the PCGS and NGC Apps Can and Cannot Do
No phone app can give a coin an official grade. The free PCGS and NGC apps look up graded coins, show price guide values and population counts, and help you estimate a grade by comparing photos. Here is what each official app does, what a photo cannot show, and how to work out melt value yourself.
How to Get Coins Graded: A Step-by-Step Guide to PCGS and NGC Submissions
How to get a coin graded by PCGS or NGC, from deciding whether it is worth it to the sealed holder coming back: membership or dealer, the tier for your declared value, the form, packing and insurance, turnaround, after-grading services and what each guarantee covers.
