Explore Gems with Confidence

Have questions about birthstone types, millimeter-to-carat conversions, gemstone cut styles, durability, or how diamonds are graded? This guide brings helpful articles together to answer common questions and share interesting facts about gems.

Traditional & Modern Birthstone Colors

Looking for a specific birthstone color and meaning to spark gift ideas? Use this quick guide to birthstone hues and symbolism.

Anniversary Jewelry & Gemstone Guide

Gemstones for anniversaries are rich with tradition and symbolism—choose a stone that celebrates your milestone in a meaningful way. Learn more.

25 Facts About Diamonds | Diamond Grading System

Before purchasing a diamond, understand its history, meaning, color options, and how grading works—clarity, cut, color, and carat.

AGTA Certification

MONOLISA sources nearly all gemstones from AGTA-certified suppliers for quality, ethical practices, and full disclosure. Learn what AGTA certification means.

Natural vs Lab-Grown Gemstones

MONOLISA uses both natural and lab-grown gemstones—each chosen for brilliance, quality, and traceable sourcing. Read the full comparison.

20 Facts About Tourmaline Gemstones

Tourmalines are prized for eye-catching shapes and colors. If you love gem variety, explore these 20 intriguing facts.

Interesting Facts About Ruby Gemstones

Discover a ruby’s history, meaning, formation, and color range—why jewelers love this rare, durable gem. Discover the facts.

15 Facts About Garnets

Known for rich reds and greens, garnets are beautiful and approachable. Learn the history, meaning, formation, and care tips. Learn more.

Interesting Facts About the Emerald Gemstone

Explore the emerald’s history, symbolism, formation, color options, and why this green gem is so beloved. Learn about emeralds.

Facts About Spinel Gemstones

Once you discover spinel’s spectrum of colors and sparkle, it’s hard not to fall in love. Read the facts.

20 Facts About Aquamarine Gemstones

Learn the blue gem’s history, meaning, formation, and color options in this helpful overview.

10 Facts About the Peridot Birthstone

Get to know peridot—its history, meaning, care tips, and signature lime-green glow. Read the article.

10 Interesting Facts About the Amethyst Gemstone

Explore the purple gem’s history, meaning, color options, and care. Read the blog.

What Are 25 Facts About Gemstones?

If you’re a gemstone enthusiast, don’t miss these 25 interesting facts. Read gemstone facts.

Millimeters to Carat Conversion Chart

Convert gemstone sizes in millimeters (mm) to carat weight for diamonds, sapphires, spinel, aquamarine, and more.

12 Facts About Akoya Pearls

Known for mirror luster and near-perfect roundness, Akoya pearls are among the highest quality pearls available. Learn more.

What Are the Different Gemstone Cuts?

A handy list of faceted gemstone styles—brilliant, step, and mixed cuts—for diamonds, sapphires, topaz, spinel, aquamarine, tourmaline, peridot, amethyst, and more.

How Is a Gemstone Ring Made?

Go behind the scenes for a day in the studio and see the artisan steps that bring a gemstone ring to life.

What Is the Mohs Gemstone Hardness Scale?

The Mohs Scale measures mineral hardness from 1 (softest) to 10 (hardest) and helps compare durability across gemstones.

15 Facts About Sapphires

From color variety to durability, explore key facts to better understand this treasured precious gemstone.

What Is the History Behind a Topaz Gemstone?

Get the backstory on topaz—history, meaning, formation, and color options. Read the history.

Tell Me About Opal Gemstones

Answers to common opal questions—from play-of-color to care considerations—in a friendly overview.

MONOLISA Gemstone Designs

Hand-made designs crafted with high-grade faceted gemstones from around the world. Explore the full MONOLISA Jewelry Collection.