Lucy's Diamond Insights
Deep market analysis, price trends, and diamond buying intelligence from Lucy, our resident diamond market analyst.
Subscribe via RSSThe natural diamond market split in two this week
Natural diamonds averaged down 2.66% this week while lab-grown edged up 1.70%, but those averages bury the real story. A 67% crash in 4ct to 5ct natural hearts, a 61% surge in D to E rounds, and a 49% collapse in lab-grown entry level rounds all happened in the same seven days. The market is moving in sharply different directions depending on which category you're watching.
Lab-Grown Diamond Price Chart 2020 to 2026, the 80 Percent Collapse
Lab-grown diamond prices have fallen roughly 80 percent since 2020, with the median for a 1ct G VS2 round brilliant dropping from around $3,400 to between $700 and $900 per carat. This is not a story about consumer rejection. CVD reactor capacity from India and China outpaced demand, and the year-by-year price data shows exactly when and how fast.
Diamond Carat Weight Guide, Magic Sizes and the Shy Carat Trick
A one carat diamond is a weight, not a size. Two stones with identical certificates can look dramatically different face up. Understanding magic size pricing and the shy carat trick can save you 8 to 15 percent on a stone that faces up indistinguishably from its heavier, pricier neighbour.
Diamond Colour Guide, D Through Z With Settings That Hide Warmth
The GIA colour scale runs from D to Z but what matters in wear is how your chosen grade reads against your setting metal. An H in yellow gold faces up white; an H in platinum shows warmth. This guide walks every colour band and tells you where the real value sits.
Diamond Clarity Guide, FL Through I3 With Real Inventory Data
The GIA clarity scale runs eleven grades from FL to I3, and most buyers shopping round brilliants under 1.5 carats can ignore eight of them. VS2 is the sweet spot for rounds, VS1 is the minimum for step cuts, and the real work for SI1 stones is in the inclusion plot, not the grade.
How Much Does a 1 Carat Diamond Cost in 2026, Live Data
The median price for a 1ct natural round brilliant sits at $2,730 USD in August 2026, based on over 272,000 active listings across 110 retailers. Lab-grown rounds at the same weight class have a median of $362, an 87 percent discount that widens as carat weight increases. Colour, clarity, shape, and the threshold effect at exactly 1.00ct all move the number significantly from that median.
How to Read a GIA Diamond Report, Field by Field
A GIA grading report has far more information than the headline colour and clarity grades. This field-by-field walkthrough covers every section from the header and proportions diagram through to the comments field, where the details that actually affect price are hiding.
Diamond Cut Guide, Why Cut Matters More Than the Other 3Cs
Cut is the only C that changes how a diamond performs after it leaves the ground. Two stones with identical colour, clarity, and carat weight can look completely different because of cut, and that difference is visible to the naked eye in any normal light. This guide covers the GIA five-grade scale, the proportions that drive each grade, and what to do when a cut grade doesn't exist.
Why a 1ct Natural Round Diamond Costs Different Across AUD, USD, GBP, EUR and JPY
Most diamond price comparison tools default to USD and convert to local currency. We index the retailer's actual local listing across 15 regions, and the gap between a converted estimate and the real price can be significant. For purchases above USD $12,000, getting regional pricing right is a serious part of the decision.
Engagement Ring Budget Tiers at $3K, $5K, $10K and $20K
At $3,000, a natural diamond at any meaningful quality level is largely out of reach. At $20,000, lab-grown can deliver a 4ct to 5ct oval in excellent grades. This post maps what the CaratHunter index actually says you should be buying at each price point, updated monthly.
2 Carat Lab-Grown Oval, Where the Best Value Sits in 2026
The median price for a 2ct lab-grown oval in the 1.75 to 2.24ct band is $1,237. The natural equivalent is $12,595. With over 200,000 active listings to sort through, knowing which ratio, colour, and clarity targets to set is the difference between a stone that performs and one that disappoints.
1.5 Carat Round D VVS1 What the Data Shows About Fair Price
The median natural round in the 1.25 to 1.74 carat band sits at $6,308. Specify D colour and VVS1 clarity, and you're in a price tier where comparison-shopping pays off significantly. We ran the numbers on lab-grown and natural 1.5ct round D VVS1 to show where fair price actually sits.