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On the AH it seems like the cost to buy some of the gems outright is cheaper than it is to combine 3 lesser gems, but I don't have any to check. How much does it cost (in gold and materials) to combine gems between each quality level?

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2 Answers 2

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In case you were interested in the cumulative costs:

Gems Gold Pages Tomes Secrets Chips Gold Pages Tomes Secrets
1 Chipped N/A 1
2 Flawed 2 10 2 10
3 Regular 2 25 4 45
4 Flawless 2 40 8 130
5 Perfect 2 55 1 16 315 1
6 Radiant 2 70 2 32 700 4
7 Square 2 85 1 64 1485 8 1
8 Flawless Square 2 100 2 128 3070 16 4
9 Perfect Square 3 30000 3 384 39210 32 8 3
10 Radiant Square 3 50000 6 1152 167630 96 24 15
11 Star 3 80000 9 3456 582890 288 72 54
12 Flawless Star 3 100000 12 10368 1848670 864 216 174
13 Perfect Star 3 200000 15 31104 5746010 2592 648 537
14 Radiant Star 3 400000 20 93312 17638030 7776 1944 1631

Table data source: Cumulative costs starting with chipped gems

Rather than starting with a Chipped gem, here are cumulative costs starting with Flawless Squares (the highest rank gem that drops):

Flawless Squares Gold Secrets
8 Flawless Square 1 0
9 Perfect Square 3 30000 3
10 Radiant Square 9 140000 15
11 Star 27 500000 54
12 Flawless Star 81 1600000 174
13 Perfect Star 243 5000000 537
14 Radiant Star 729 15400000 1631

Table data source: Cumulative costs starting with flawless squares

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I've listed all of the costs below. Remember, that this is the cost in addition to the gems of the previous level.

The recipes below require 2 gems of the previous level

  • Rank 1 Chipped: n/a
  • Rank 2 Flawed: 10 gold
  • Rank 3 Regular: 25 gold
  • Rank 4 Flawless: 40 gold
  • Rank 5 Perfect: 55 gold and 1 Page of Jewelcrafting
  • Rank 6 Radiant: 70 gold and 2 Pages of Jewelcrafting
  • Rank 7 Square: 80 gold 1 Tome of Jewelcrafting
  • Rank 8 Flawless Square: 100 gold and 2 Tomes of Jewelcrafting


The gems below do not drop and must be crafted using 3 gems of the previous level

  • Rank 9 Perfect Square: 30,000 gold and 3 Tomes of Secrets
  • Rank 10 Radiant Square: 50,000 gold and 6 Tomes of Secrets
  • Rank 11 Star: 80,000 gold and 9 Tomes of Secrets
  • Rank 12 Flawless Star: 100,000 gold and 12 Tomes of Secrets
  • Rank 13 Perfect Star: 200,000 gold and 15 Tomes of Secrets
  • Rank 14 Radiant Star: 400,000 gold and 20 Tomes of Secrets

Thankfully, Gems in Diablo III are reusable, so you won't have to recreate Rank 14 gems every time you get a new socketed upgrade.

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  • 2
    Might want to add that flawless square is the highest possible drop, and you'll need 729 of those in total to get a Radiant Star. Commented May 20, 2012 at 17:19
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    @RavenDreamer Also, if you disenchant an item with a gem, it'll give your gem back.
    – Michel
    Commented May 21, 2012 at 17:02
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    Stats fixed. Man, Rank 14 is expensive. Commented May 21, 2012 at 18:48

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