Tiffany $2,200 vs Costco $800 Diamond Studs — The Cheaper Pair Is BIGGER

Описание: 💎 Tiffany diamond studs for $2,200, Kay's "1 carat" studs for $2,099, or Costco diamond studs for $799. Which pair actually gives you more diamond? I audited the current listings from Tiffany, Kay Jewelers and Costco side by side. The cheapest pair carries about 60% more diamond than Tiffany's, at a third of the price, and grades four clarity steps above Kay's.

✨ In this diamond stud earrings buying guide you'll learn:
✅ What "ctw" (carat total weight) really means on a pair of studs
✅ The diamond clarity scale, and why VS2 vs I2 matters most on earrings
✅ Tiffany's real price per carat (about $7,100) and what you get for it
✅ Why Kay's 1 ct tw "30% off" studs are graded I2 clarity
✅ Costco's VS2 / I color diamond floor, and its honest trade-offs
✅ Which pair to buy as a Christmas gift, depending on what matters to you

⏱️ CHAPTERS
0:00 Three boxes, three prices
1:03 The basics: ctw, clarity & price per carat
2:21 Tiffany: $2,200 for 0.31 ct tw
3:53 Kay: "1 carat" for $2,099.99 at I2 clarity
6:05 Costco: $799.99 for 0.50 ct tw at VS2
8:10 Side by side: 5 criteria
9:42 Which diamond studs should you buy?
10:44 Your turn: what clarity are your studs?

🔎 PAIRS COMPARED (listings checked 20 Oct 2026)
• Tiffany Solitaire Diamond Stud Earrings, platinum, 0.31 ct tw: $2,200
• Kay Round-Cut Diamond Solitaire Earrings, 1 ct tw, 14K white gold, I/I2: $2,999.99 regular, $2,099.99 sale
• Costco 14kt White Gold VS2 I 0.50 CTW Round Diamond Studs (#1227760): $799.99
• Costco 14kt White Gold VS2 I 1.00 CTW Round Diamond Studs (#1342638): $1,999.99
Prices change often and vary by store. Always check the current listing.

📐 PRICE PER CARAT
Tiffany ≈ $7,100/ct · Kay ≈ $2,100/ct (I2) · Costco ≈ $1,600–2,000/ct (VS2)

📚 SOURCES
Tiffany.com, Kay.com and Costco.com product listings · Costco diamond jewelry information page · Signet Jewelers FY2026 results (Business Wire, 19 Mar 2026) · Warehouse Runner (Costco price tracker)

🛡️ Jewelry Audit takes no sponsorships, no paid brand deals and no free products. This is a listing-and-specs audit; no pairs were provided by any brand. Not affiliated with or endorsed by Tiffany & Co., Kay Jewelers or Costco. For education only.

💬 Your turn: what clarity grade do your diamond studs list: VS2, SI1, I1 or I2? Tell me in the comments.

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