TWCC Knowledge Base
Learn the fundamentals of coins, bullion, precious metals, and how they’re valued. Whether you’re new to the space or looking to deepen your understanding, this knowledge base breaks down key concepts in a clear, straightforward way.
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How We Test Gold & Silver
Professional testing for accurate, transparent results.
Every item we evaluate is tested using industry-standard equipment to determine its true metal content. We use XRF analysis, Sigma Metalytics verification, precision scales, and magnification to assess purity, weight, and authenticity.
Introduction to Precious Metals
What they are, why they matter, and how they’re valued.
Explore the basics of gold, silver, platinum, and palladium- including how prices are determined, what “spot price” means, and how intrinsic value differs from collectible (numismatic) value. This is the foundation for understanding any transaction in precious metals.
Gold & Silver Jewelry
From jewelry to scrap- understanding gold and silver content and value.
Gold and silver aren’t always pure. Learn how gold karat works (10k, 14k, 18k, etc.) and how silver is identified and valued (sterling, 925, 800, etc.). We break down how both metals are tested, refined, and evaluated- whether in jewelry, bullion, or scrap form- based on their actual metal content.
Coins VS Bullion
What’s the difference- and what should you own?
Coins and bullion serve different purposes. We break down government-issued coins vs private mint products, premiums over spot, and why some items are better for stacking, while others carry added collector value. Clear, practical examples included.
Coin Grading & Certification
Grading, authenticity, and market value explained.
Certified coins are graded and encapsulated by trusted third-party services like NGC and PCGS. Learn what grading means, how it impacts value, and why some coins trade far above melt value. We also cover CAC, auction markets, and wholesale vs retail pricing.
Pricing & Market Concepts
How precious metals are priced and why values change.
Learn how spot price, melt value, and premiums work together to determine what metals are worth. Understand bid vs ask pricing, why prices fluctuate throughout the day, and how different products are valued relative to their metal content.