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Nu Stack Blog

Guides, strategies, and market insights for precious metals buyers and stackers.

Pawn Shop Gold Calculator — How to Know Their Number Before They Do

May 9, 20266 min read

Walking into a pawn shop without knowing the melt value of your gold is like negotiating a car price without checking the Blue Book value first. You're relying…

Refinery Shipping for Scrap Gold — Safety, Insurance & Settlement

May 8, 20265 min read

At some point, every scrap gold buyer faces the same question: now what? You've accumulated a batch of scrap — broken chains, mismatched earrings, dental gold,…

The Gold-Silver Ratio — What It Means for Stackers

May 6, 20265 min read

If you spend any time in stacking communities, you'll hear people talk about "the ratio." They're referring to the gold/silver ratio — a simple number that's b…

Where to Sell Silver — Buyer Channels Compared

May 5, 20266 min read

If you've got silver to sell — whether it's a tube of Eagles, a bag of junk silver, a box of sterling flatware, or a collection you inherited — the first quest…

Facebook Marketplace Gold Deals: A Buyer's Playbook

May 4, 20264 min read

Facebook Marketplace has become one of the most active channels for buying and selling gold jewelry. Sellers list everything from single rings to entire collec…

Scrap Silver Prices — Today's Per-Gram & Per-Ounce Values

May 3, 20265 min read

The price of scrap silver today comes down to a simple equation: weight times purity times the live silver spot price. That gives you the melt value — what the…

Pawn Shop Gold — The Complete Buyer & Seller Guide

May 2, 20268 min read

Pawn shops are one of the most consistent sources of scrap gold for buyers at every level. They acquire gold through pawns, direct purchases, and forfeited col…

Selling Gold & Silver Coins — The Complete Guide

May 1, 20267 min read

Selling gold coins isn't complicated, but selling them well requires knowing what you have and matching each coin to the right buyer. A common-date American Go…

AI Coin Identification: How Nu Stack Identifies Coins from Photos

April 30, 20264 min read

You're at an estate sale and someone hands you a bag of old coins. You recognize a few — there's a Morgan dollar, a couple of Walking Liberties. But there are …

Gold Karat Calculator — Convert Karats to Purity & Value

April 29, 20266 min read

A karat is a unit of gold purity — a way to express how much of a piece is actually gold versus alloy metals. It's the most important number in any gold transa…

How I Built a $10K Silver Stack Starting with $50/Week

April 28, 20265 min read

I didn't start with a pile of money or a master plan. I started with fifty bucks a week and a decision to stop thinking about stacking and actually do it. That…

How to Sell Silver Coins for the Best Price

April 27, 20267 min read

You've got silver coins and you want to sell them. Maybe you inherited a collection, maybe you're rebalancing your stack, or maybe you need cash. Whatever the …

How to Use SMA, RSI, and MACD to Time Gold and Silver Buys

April 26, 20265 min read

Most precious metals buyers make purchasing decisions based on feel. Gold dropped today, so it seems like a good time to buy. Silver's been climbing for two we…

How the Nu Stack Chrome Extension Finds Deals While You Browse

April 24, 20265 min read

Browsing online marketplaces for gold and silver deals is a time sink. You scroll through hundreds of listings on Facebook Marketplace, most of which are overp…

How to Test Gold Purity — Magnet, Acid, Electronic & XRF Methods

April 22, 20265 min read

A karat stamp tells you what the manufacturer says a piece is. A purity test tells you what it actually is. If you're buying scrap gold — especially from the p…

Top 5 Mistakes New Scrap Gold Buyers Make

April 20, 20265 min read

Every scrap gold buyer pays tuition. The question is how much. Some mistakes cost you $20 and a lesson. Others cost hundreds and a chunk of your confidence. Th…

Gold Melt Value — The Complete Calculation Reference

April 19, 20266 min read

Every gold transaction starts with one number: the melt value. It's the dollar amount the pure gold content of a piece is worth at today's market price — what …

Gold Karat Explained — 10K vs 14K vs 18K vs 24K

April 18, 20265 min read

If you've ever looked at a gold ring and wondered what "14K" actually means — or why a 10K chain costs so much less than an 18K chain of the same size — this g…

2026 Precious Metals Outlook: What Stackers Need to Know

April 16, 20265 min read

Nobody can predict where gold and silver prices will be in six months. Anyone who tells you otherwise is selling something. But you don't need a prediction to …

Scrap Gold Value — Today's Per-Gram Prices by Karat

April 15, 20269 min read

Scrap gold is worth exactly what the math says it's worth — weight times purity times today's spot price. That number is the melt value, and in 2026, with gold…

The Complete Scrap Gold Buying Guide

April 14, 20267 min read

Buying scrap gold is one of those businesses that looks simple from the outside. Someone sells you their old jewelry for less than the gold is worth, you sell …

10K Gold Value — Per Gram, Scrap & Real Prices in 2026

April 13, 20268 min read

10K gold gets overlooked. A lot of buyers skip right past it, thinking it's barely gold at all — "only 10 karats." That's a mistake. 10K gold is 41.67% pure go…

How to Track Your Precious Metals Portfolio (Beyond Spreadsheets)

April 12, 20265 min read

You started with a simple spreadsheet. One tab for gold, one for silver. Date, weight, karat, what you paid. It worked fine when you had ten entries.

Silver Melt Value — How to Calculate Per Ounce & Per Gram

April 11, 20266 min read

You're standing at a flea market holding a bag of pre-1965 quarters. The seller wants $120. Are they worth it? The answer comes down to one number: the melt va…

Melt Value Explained — The Complete Buyer's Guide

April 10, 20265 min read

You're at a pawn shop. The owner slides a tray of gold chains across the counter and says, "I'll take $600 for the lot." The chains look heavy. The stamps say …

14K Gold Value — Per Gram, Scrap & Real Prices in 2026

April 10, 20268 min read

If you're holding a 14K gold chain, ring, or bracelet and wondering what it's actually worth, you're asking the right question. The answer depends on three thi…

The Scrap Gold Business — Can You Actually Make a Living at It?

April 8, 20267 min read

Every scrap gold buyer has thought about it at some point. You're making $200 profit on a Tuesday afternoon deal and you think: what if I did this full time? W…

Gold vs Silver — Which Should You Stack in 2026?

April 6, 20266 min read

It's the question that starts more arguments in the stacking community than anything else: gold or silver? Both have been money for thousands of years. Both ho…

Nu Stack vs GoldFolio: Which Precious Metals App Is Right for You?

April 4, 20266 min read

If you're searching for a precious metals app, you've probably come across GoldFolio and Nu Stack. Both deal with gold and silver. Both have free tiers. Both l…

Best Scrap Gold Calculator Apps in 2026 (Compared)

April 2, 20267 min read

If you're still calculating melt value with a phone calculator and a spot price you Googled ten minutes ago, you're working harder than you need to. Scrap gold…

How to Calculate Scrap Gold Value in 2026

March 31, 20267 min read

You're standing at a pawn shop counter. The seller wants $180 for a 14K gold chain. It looks heavy — maybe 20 grams. Is that a good deal, or are you about to l…