A practical toolkit for curious minds
Online tools, calculators and guides
GemsMakers is a directory of focused online calculators, checkers, planners and guides. Browse resources for jewelry, gemstones, metals, watches, construction, cars, fitness, games and other practical topics.
Useful tools, organized around what you need to do
Explore the collection
Start with a topic or search the full tool directory.
Popular categories
Specialized tools
FIND STONE DATA
GEM RARITY METER (1000+ STONES)
CAB SIZE CALCULATOR
Rare Stone Worth Finder
Reveal My Style Archetype
Spinel Fire & Value Tool
Apple Watch Size Finder
Bangle Stacker
Banglecalc
Bead Length Calculator
Bead Pattern Visualizer
Bead Size Checker
Watch Bezel Timer
Blog
Books
Bracelet Maker
Bracelet Fit Visualizer
Bracelet Sizer
Brooch Pin
Cat's Eye Gemstone Guide
Hollow vs Solid Chain Checker
Chain Strength Calculator
Chain Weight Calculator
Watch Charger Matcher
Choker Kiss Length
Choker Fit Calculator
Cuban Link Drape Length
Cuban Link Width Engine
Jewelry Decision Helper
Diamond Shape Matcher
Diamond Cut Score
Diamond Sparkle Simulator
Diamond Price Calculator
Diamond Tennis Bracelet
Diamond Carat Weight
Ear Stack Map
Earring Designer
Earring Architect
Earring Size Visualizer
Emerald Grade Calculator
Engagement Ring Planner
Ring Engraving Preview
Gem Margin Engine
Gemstone Clarity Guide
Gemstone Color Grading
Gemstone Buying Helper
Gemstone Mohs Hardness
Gemstone Wear Risk
Gemstone Size Visualizer
Gemstone Weight Calculator
Gold Chain Weight
Golden Lab Tools
Gold Lab Calculator
Gold Purity & Karat
Gold Density & Purity Check
Custom Grillz Calculator
Grillz 3D Preview
Hallmark Identifier
Ring on Hand Visualizer
Hoop Metal Matcher
Hoop Size Visualizer
Earring Weight Comfort
Jewelry Digital Certificate
Jewelry Green Score
Jewelry Insurance
Jewelry Oxidation
Jewelry Wear Cost Per Day
Watch Strap Keeper Finder
Mixed Metal Analyzer
Natural vs Lab Grown Checker
Necklace Length Visualizer
Nose Ring Tension Guide
Nose Ring Sizing Guide
Opal Authenticity Checker 💎
Gemstone Heat Tolerance
Pearls
Permanent vs Clasp Bracelet
Gem & Gold Portfolio
Jewelry Price Calculator
Live Precious Metal Prices
Gemstone Raytracer
Real emerald or fake emerald checker 💎
Ring Metal & Size Calculator
Ring Fit Checker
Online Ring Sizer
Rolex Authenticity Checker
Ruby Colour Price Estimation
Ruby Weight Optimizer
Ruby X-Ray
Scrap Gold Melt Calculator
Seiko Mod Compatibility
Shop
Silver Ring Weight
Jewelry Solder Guide
Solitaire Size Illusion
Diamond Undertone Picker
Watch Spring Bar Sizer
Stacking Architect
Stone To Settings
Watch Strap Visualizer
Ring Prong Stress Map
Jewelry Markup Checker
Watch Comparator
Watch Mixed Metal
Custom Watch Studio
Watch Reference Decoder
GMT Watch Timezone Tool
Watch Lume Simulator
Watch Moonphase Tool
Watch Movement Explorer
Watch Beat Rate Visualizer
Watch Accuracy Tracker
Watch Style Finder
Watch Wrist Visualizer
Waterproof Jewelry
Watch Water Resistance
Wax to Metal Calculator
White Gold Wear Estimator
No matching tools. Try another search.
Tools for practical tasks and specialist interests
GemsMakers brings together focused online tools to help you calculate, compare, plan, check and explore. Browse by topic or search for a tool by name.
From jewelry and gemstone resources to practical calculators, trackers, games and guides, each directory link takes you to its dedicated page.