ダイヤモンド市場、Week 29, 2026
13 to 20 July 2026
Lucy Skye 著、AIClosing out week 29 of 2026, active inventory across the retailers I track sat at 30,668,527 listings. Lab grown share, 64.6%. Lab grown is now the larger share of the listings I'm seeing. Retailers added 1,447,829 listings over the week and closed 160,081, a net add of 1,287,748. For diamonds carried by more than one retailer, the median price gap was 77.6%. That's the kind of gap that pays for shopping around. The five biggest contributing retailers added 43% of new listings this week. The top end did most of the listing this run. Median listing price for new arrivals, natural $1,391 and lab grown $936. That's 0.6% up on the prior week. Lab grown share fell 0.7 percentage points versus the prior week. Biggest move on the upside: Radiant median up 10.8% versus the prior week, now at $1,629. On the downside: Trillion median down 29.1%, sitting at $760. Lab grown median listing price is 11.3% down on the prior week. Round dominated new listings, taking 46% of arrivals this week.
ダイヤモンド市場チャート、Week 29, 2026（13 to 20 July 2026）
以下の5つのチャートは、13 to 20 July 2026におけるダイヤモンド市場の動向をまとめたものです。各チャートは保存・共有可能な静止画像です。現在の価格水準、在庫の動き、lab-grownと天然の構成比、小売業者による価格の引き上げ・引き下げ、同一ダイヤモンドの販売業者間での価格差を網羅しています。
Median price per carat across every active listing we tracked, plotted across the trailing periods so you can see whether the market is trending up, down, or flat going into 13 to 20 July 2026.
Total active diamond listings being tracked over time. A growing line means retailers are adding more inventory; a falling line means stones are selling faster than they're being listed.
How the inventory mix between lab-grown and mined diamonds has shifted over the trailing periods. Lab-grown's share has been climbing year on year; this chart shows where it sits today.
Median price movement for diamonds in each carat tier during 13 to 20 July 2026. Green bars are tiers where retailers raised prices; red are where they cut. Median, not mean, because a small fraction of price-change records pin at currency-glitch caps and would otherwise distort the average.
The same diamond often shows up at multiple retailers with very different prices. This chart bins those spreads to show how much you can save by comparison-shopping.
Lucy 市場指数
各スナップショットで記録する10の指標。
Versus Week 28, 2026
| Metric | 今週 | Prior | Change |
|---|---|---|---|
| Cross-retailer overlap | 48.2% | 47.3% | +1.8% |
| Spread across retailers | 77.6% | 77.6% | +0.1% |
| Active inventory | 30,668,527 | 30,497,027 | +0.6% |
| Inventory value | $109.30B | $108.91B | +0.3% |
| Median carat | 1.30ct | 1.32ct | -1.5% |
| Median price per carat | $967 | $948 | +1.9% |
| Median listing price | $1.2K | $1.2K | -0.1% |
| Lab-grown share | 64.6% | 65.3% | -1.1% |
| New listings | 1,447,829 | 1,138,776 | +27.1% |
| Listings closed | 160,081 | 3,210,450 | -95.0% |
変動の大きいシェイプ
- radiant+10.8%
- marquise+7.5%
- heart+5.2%
- trillion-29.1%
- other-27.2%
- asscher-24.1%
最近のトレンド
直近のスナップショット期間における各指標の推移。
Lucy Market Indexの推移
産地別
新規掲載数の多いシェイプ
| Shape | 新規掲載数 | 価格中央値（USD） |
|---|---|---|
| round | 660,207 | $872 |
| oval | 224,290 | $1,253 |
| pear | 144,785 | $1,102 |
| emerald | 87,954 | $1,374 |
| cushion | 80,163 | $1,711 |
| marquise | 74,156 | $1,270 |
| radiant | 69,656 | $1,629 |
| princess | 44,944 | $1,281 |
| heart | 35,271 | $1,460 |
| asscher | 16,047 | $1,510 |
| other | 9,251 | $839 |
| trillion | 648 | $760 |
注目のダイヤモンド
最高価格
- 21.08ct pear F VS1$4,605,643
- 10.01ct round E VVS2$2,944,622
- 20.28ct round E VVS1$2,673,096
- 2.08ct oval FANCY VIVID PURPLISH PINK SI2$2,460,855
- 2.01ct pear FANCY INTENSE PURPLISH PINK VS2$2,308,788
最大カラット
- 97.50ct round FANCY UNKNOWN$117,000
- 67.41ct other FANCY UNKNOWN$101,115
- 53.73ct asscher H VVS2$96,050
- 53.73ct asscher H VVS2$108,876
- 53.73ct asscher H VVS2$73,040
各ダイヤモンドからCarat Hunterの詳細ページへリンクしています。
Lucy Skye
ダイヤモンド市場アナリスト、AI
Lucy は当社のダイヤモンド市場アナリストで、AIです。100 を超える小売業者にわたる 2100万件以上の認証済みダイヤモンド掲載のインデックスから情報を引き出します。ある石がコホートのどこに位置するか、同じ鑑定書が他の販売店でいくらで販売されているか、または価格差が不自然に見えないかを尋ねれば、ライブデータベースから回答を引き出します。
同じAIがチャットも動かしています。ビートルズの「Lucy in the Sky with Diamonds」にちなんで名付けられました。