Introduction
Buying a diamond is one of the most meaningful purchases you'll ever make. It marks a beginning — a commitment, a chapter, a story that will be told for generations.
It's also, for most people, completely unfamiliar territory. The language is technical. The pricing is opaque. And for decades, the industry has relied on that opacity to maintain its margins.
We built Genesis Stones to change that. This guide gives you everything you need to walk into the buying process with clarity — what lab-grown diamonds are, how they're graded, how to choose the right stone, and how to avoid the mistakes most buyers make. No pressure, no upsell. Just the truth.
Bookmark this page. It's the only diamond buying guide you'll need.
What is a lab-grown diamond?
A lab-grown diamond is a real diamond. Chemically, physically, and optically identical to a mined diamond — the same carbon crystal structure, the same hardness (10 on the Mohs scale), the same fire and brilliance. The only difference is origin: one formed over billions of years underground; the other was grown in a controlled laboratory environment over a matter of weeks.
There are two methods used to create lab diamonds:
- High Pressure High Temperature (HPHT) — mimics the natural geological process by subjecting a carbon seed to extreme pressure and heat.
- Chemical Vapour Deposition (CVD) — builds the diamond layer by layer from a carbon-rich gas in a vacuum chamber.
Both produce genuine diamonds. Both are certified by the same grading laboratories — IGI, GIA — using the same criteria as mined stones. The result is a diamond you can wear, inherit, and pass on.
At Genesis Stones, we carry lab-grown diamonds exclusively for diamond jewellery. Not because we're anti-mined. Because we believe lab-grown offers our customers a better value for an equally beautiful, equally real stone.
The 4Cs explained
Every diamond — lab-grown or mined — is graded on four criteria: Cut, Color, Clarity, and Carat. Understanding these is the foundation of every smart diamond purchase.
Cut
Cut is the most important of the 4Cs. Not shape (round, oval, emerald) — cut quality. A well-cut diamond returns light beautifully. A poorly cut stone looks dull regardless of its color or clarity grade.
Look for Excellent or Very Good cut grades. This is where you should never compromise.
Color
Diamond color is graded D (colorless) through Z (noticeable yellow). The sweet spot for most buyers is G-H — near-colorless to the naked eye, but meaningfully less expensive than D-F. In a yellow gold setting, an H or even I-J stone can look stunning.
Unless you're buying a D-F stone for investment purposes, color is one of the best places to optimize your budget.
Clarity
Clarity grades range from FL (flawless) to I3 (included). The key concept to understand is eye-clean: a diamond that has no inclusions visible to the naked eye at normal viewing distance.
VS1-VS2 and SI1 diamonds are typically eye-clean and offer excellent value. FL and IF grades are premium-priced for perfection that is invisible in real wear.
Carat
Carat is weight — not size. Two diamonds of the same carat weight can look very different in size depending on their cut, shape, and proportions. An oval diamond will typically look larger face-up than a round diamond of the same carat weight, for example.
Avoid round numbers. A 0.95ct diamond looks virtually identical to a 1.00ct stone and can be significantly less expensive.
Certification: why it matters and what to look for
A diamond certificate is an independent grading report from a gemological laboratory. It's the only way to verify that a diamond is what the seller claims it is.
At Genesis Stones, every diamond we offer comes with a certificate from either IGI (International Gemological Institute) or GIA (Gemological Institute of America) — the two most respected laboratories in the industry.
When reviewing a certificate, confirm:
- Diamond type is confirmed as lab-grown
- All 4Cs are graded as described
- Shape and measurements match what you're being shown
- The certificate number is laser-inscribed on the diamond's girdle and matches the physical stone
How to set your budget
There is no right number. But there is a right approach.
Start with what you can comfortably spend without financial strain. Then understand what that budget buys you — because with lab-grown diamonds, it buys considerably more than it would with a mined stone.
A lab-grown diamond of the same quality, size, and certification typically costs 60-80% less than its mined equivalent. That means a budget that would have bought you a 0.8ct mined diamond might comfortably reach a 1.5ct lab-grown stone with excellent cut quality.
The three levers to optimize:
- Prioritize cut above everything. An Excellent cut SI1 H stone will outshine a Fair cut VS1 F stone every time.
- Step down on color if you're setting in yellow gold — the warmth of the metal masks any hint of color in the stone.
- Choose eye-clean over flawless. VS2 or SI1 stones are beautiful. FL grades are premium-priced for a quality invisible in everyday wear.
Choosing your shape
Diamond shape is one of the most personal choices in the process. Here's a quick reference:
- Round brilliant — the most popular shape. Maximum brilliance and fire. The benchmark against which all others are measured.
- Oval — currently the most-searched shape. Elongated silhouette creates a flattering, finger-lengthening effect. Excellent brilliance.
- Emerald — a step-cut with broad, open facets and a hall-of-mirrors effect. Elegant and architectural. Requires higher clarity grades as inclusions are more visible.
- Pear — a teardrop silhouette. Vintage-feeling and distinctive. Typically worn point-up.
- Cushion — soft square or rectangular shape with rounded corners. Romantic and warm.
- Marquise — elongated with pointed ends. The longest-looking shape for its carat weight.
Natural colored gemstones: sapphire, ruby, and emerald
Not every meaningful ring is a diamond ring. Genesis Stones carries natural sapphires, rubies, and emeralds as centerpiece stones — and as complements to lab diamonds in custom designs.
Natural colored gemstones offer something diamonds can't: color with history. A deep Kashmir-blue sapphire, a vivid Burmese ruby, a Colombian emerald — these are stones with character, rarity, and warmth that stands apart from the diamond category entirely.
If you're open to something different — something considered and intentional rather than conventional — a colored centerpiece is worth exploring. Our design consultation is the place to start.
The custom design process
Every Genesis Stones piece can be made fully custom. Here's how the process works:
- Book a design consultation through our website. This is a one-on-one conversation — no sales pressure, no obligation.
- Share your vision. Reference images, preferences, budget, timeline. We listen first.
- We source your stone. We present options that match your criteria with full transparency on pricing.
- Design is confirmed and production begins. Lead time is typically 4-6 weeks.
- Your piece arrives with its certificate, care instructions, and a story worth keeping.
Start your story
You've done the reading. The next step is a conversation.
Book a complimentary design consultation with the Genesis Stones team. We'll help you find the right stone, the right design, and the right starting point for something that endures.
Book your design consultation → genesisstones.com/pages/design-consultation
