That rock you found might deserve a serious look.
Learn to identify precious and potentially rare gemstones in the field — using observation, comparison, and practical criteria. No lab. Anyone can start.
▶ GET THE FULL COURSE + FREE BONUS — $17✓ Includes free $27 bonus · ✓ 7-day guarantee · ✓ Instant access to Full Course + bonus PDF
◆ THE PROBLEM NOBODY SOLVES
You've held a rock in your hand
and you want to know its true worth.
The gap between “interesting pebble” and “worth understanding” is mostly knowledge and observation — not luck. This guide helps you notice what matters before you dismiss it or oversell it.
No reliable visual reference
Random photos online rarely teach luster, fracture, or context. You need a structured field mindset.
Guessing has a cost
Undervaluing or overvaluing a find both hurt. Calmer criteria reduce expensive mistakes.
Lab reports are selective
Professional reports are for candidates that deserve them. Smart triage saves time and money.
Dense textbooks skip the field
The Full Course is built for observation-first learning in plain language — not academic gatekeeping.
◆ OVER 147,000 GEM HUNTERS CAN'T BE WRONG
The YouTube channel that built
a global gem hunting community.
Cabo Da Nau GemStones is one of the world's most-watched gemology channels on YouTube — with 147,000+ subscribers, 464 videos, and a community of real gem hunters spanning every continent. The same knowledge that built this community is now condensed into this guide.
Hello, Gem Hunter!
Ametista do Sul · Extraction de Pierres Rares
Every video on the channel is a real lesson from real mining sites — amethyst in southern Brazil, emeralds in Colombia, rare garnets in Africa. This guide was built from that same decade of hands-on field knowledge.
WHAT OUR COMMUNITY SAYS
Found my first aquamarine after watching 3 videos. This changed everything.
👍 1.2KCabo Da Nau taught me more than any book ever did.
👍 634✓ Real YouTube community comments
◆ WHAT'S INSIDE THE GUIDE
Everything you'll work through
in this Full Course.
Whether it came from a riverbank or from a jar, a drawer, or a box you never sorted, the same feeling can show up: could this ordinary-looking piece hide something far more valuable—or at least far more interesting—on the inside? This guide helps you look with method before you guess, gift, or discard.
The visual vocabulary of valuable stones
Color behavior, luster, transparency — how to describe what you see so comparisons mean something. Same workflow for a trail find or for that rock you keep moving from shelf to windowsill at home.
Tests without a lab — field or kitchen table
Hardness thinking, fracture habits, streak where appropriate — practical triage wherever you can lay a cloth and a loupe, not a certificate.
Fakes, glass, and lookalikes
Reduce false positives when something “looks expensive” but isn’t — and avoid tossing aside a quiet candidate that deserved a second look.
When rough might hide more than it shows
Rough doesn’t always flaunt what’s inside: sometimes the story only opens once you know how to look. Learn signals that suggest photos, notes, or professional testing — without promising treasure in every rock.
From find to next step
How to think about selling or specialist help without relying on a buyer’s word alone — whether the stone arrived from a hike, a garden bed, or a relative’s old box.
Glossary you can skim under bad light
Terms tied to what you observe in rough material — including late-night sessions with stones you pulled from a drawer and finally decided to understand.
◆ WHO THIS IS FOR
If you recognize yourself here,
this Full Course was made for you.
Beginner finders
You pick up stones outside or finally open that box at home — and you want a calmer workflow than blind guessing about what might be inside.
Collectors
You want language and criteria for shelves, jars, and heirlooms — so “pretty rock” can become a real story, or a confident “not for me.”
Market value seekers
That “common” stone — from a trail or a dusty corner at home — might be worth more than you think on today’s specimen and collector market… or it might not. You want sharper triage: what actually moves price, when a paid lab test is the smart move, and how to avoid selling treasure for pocket change — or banking on hype with ordinary gravel.
Serious hobbyists
You value structure and honesty about what visual ID cannot prove — including when a dull exterior makes you curious about what only a cut or a lab could confirm.
◆ WHAT YOU RECEIVE
Everything inside
the Full Course.
◆ TRUST & INTEGRITY · YOUTUBE COMMUNITY
Public comment culture
documented like the channel itself.
COMMUNITY WALL
Voices from viewers who follow Cabo Da Nau GemStones in the field.
Cabo Da Nau is the only place I trust for ID basics — I finally learned how to use a 10× loupe the way you show in the field. That alone was worth every subscription.
👍 847Your rough-and-tumbled walkthroughs taught me more about fracture and luster than my intro textbook. I keep rewinding the same clips before I head out in Arizona.
👍 1.2KLove that you say “maybe” and “get it checked” instead of fake treasure hype. That honesty is why I use this channel as my main reference before I buy or sell anything.
👍 634The extraction footage feels real — mud, sun, mistakes included. I learned to pack light, label my bags, and never claim a species without context. Thank you for that.
👍 512Best gem-hunting education on YouTube for my whole crew — we quote your safety reminders on every trip. The EN / ES community in the comments helps my cousins follow along too.
👍 903
Order today and get
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Complete Guide to Finding, Extracting and Polishing Precious Stones
by Cabo Da Nau GemStones
12 Pages · PDF Guide
BONUS #1
Essential Tools for Gem Seekers
Complete Guide to Finding, Extracting and Polishing Precious Stones
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WHAT YOU'RE GETTING TODAY
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◆ COMMON QUESTIONS
Questions you
probably have.
Every stone has a story.
Your job is to read it honestly.
The difference between dismissing a find and investigating it properly is knowing what to look for.
▶ GET FULL COURSE + BONUS — JUST $17🔒 Encrypted checkout · 🛡️ 7-day guarantee · ⚡ Instant access · 🎁 Free $27 bonus included
Best gemology channel on YouTube. Period.
👍 847