IDEX data only
Every figure comes from IDEX tool results for the question: never from the model's memory or from other sources. When the data cannot answer, it says so.
IDEX AI · Market Intelligence
An analyst that shows its working.
Ask about the diamond market in your own words. The IDEX AI Analyst looks the figures up in IDEX market data, names the period, shows the tables it used and opens the matching view in Market Intelligence. It works from the same IDEX market data as the tools themselves.
IDEX AIMarket Intelligence AI AnalystVerified
Which diamond segments are gaining or losing value?
Cushion, 0.50–0.69 ct, I–J led the gains (+9.00%), while Princess, 0.70–0.89 ct, K–M led the declines (−8.47%).
These are the strongest movers by percentage across shape × carat group × colour band for 2026-09-28 to 2026-10-28. The 2026-10-28 snapshot is provisional.
Largest gains
| Rank | Segment | Change | Matched stones |
|---|---|---|---|
| 1 | Cushion · 0.50–0.69 ct · I–J | +9.00% | 295 |
| 2 | Pear · 5.00–5.99 ct · D–F | +3.88% | 97 |
| 3 | Oval · 4.00–4.99 ct · D–F | +3.45% | 109 |
| 4 | Emerald · 3.00–3.49 ct · D–F | +2.66% | 214 |
| 5 | Cushion · 0.70–0.89 ct · K–M | +2.62% | 129 |
Largest declines
| Rank | Segment | Change | Matched stones |
|---|---|---|---|
| 1 | Princess · 0.70–0.89 ct · K–M | −8.47% | 171 |
| 2 | Cushion · 0.50–0.69 ct · D–F | −8.22% | 1,969 |
| 3 | Princess · 0.70–0.89 ct · I–J | −7.22% | 1,293 |
| 4 | Pear · 3.00–3.49 ct · K–M | −6.64% | 101 |
| 5 | Oval · 3.00–3.49 ct · K–M | −6.54% | 131 |
Changes measure like-for-like listed asking prices per carat, not transaction values. Segments with insufficient observations or coverage are excluded from the rankings.
What are the most important market changes this month?
How it answers
Rules the analyst keeps, on every answer.
IDEX AI is built for professionals who have to stand behind a figure. These rules are part of how it works, not a disclaimer at the end.
Checked before it is shown
Every answer carries a status. Figures that cannot be verified against the data are withheld, and the answer says what it could not confirm.
Labelled like the tools
Asking prices are called listed asking prices, not transaction values; today's snapshot is called provisional; thin segments are left out of rankings.
No forecasts
It describes how the listed market moved. It does not predict where prices go next.
No causes it cannot show
It does not explain why prices moved or speak about sales or demand, because IDEX listing data does not show them.
Not investment advice
It explains the market; it does not tell anyone what to buy, sell or hold.
Where you use it
Inside Market Intelligence, in the Retailer Hub.
The AI Analyst is part of Market Intelligence in your team's Hub Workspace, in the language of your Hub. Developers can ask the same analyst through the IDEX Data Platform API.
Recorded examples on this website. The answers shown here were recorded from the real analyst on the date stated. This website never sends a question to IDEX AI.
Answers you can trace. Each answer names its period and segments and can open the matching view of the tool, so a colleague sees the same figures.
Get Access
Put IDEX AI to work on your questions.
Tell us about your company. IDEX reviews every request and replies by email. Approved companies choose their products inside the IDEX Retailer Hub.
01Request access with your company details
02Confirm your email address
03IDEX reviews your request by hand
04Sign in to the Retailer Hub and choose your products