If you are considering buying a diamond for use in jewelry,
here are some following suggestions:

1. In general, add 50% to the carat weight for an uncut diamond because they are more bulky than faceted diamonds. A 1.00 carat brilliant-cut faceted diamond is 6.4 mm in diameter around the girdle. A similar sized 6.5 mm uncut diamond will be in the 1.5 carat range.

2. The exception to rule number 1 above is a macle diamond. These are triangular diamond crystals that are the result of crystal twinning and they resemble triangular trillion-cut faceted diamonds. Because they are shallower than comparable uncut diamonds of equal weight, they appear much larger for a given carat weight. A 6 mm (on each of the triangular edges) macle diamond will weigh approximately 1.00 carat.

3. Look for a diamond crystal with natural sparkle - lots of small reflections of light caused by the crystal faces bouncing light internally throughout the crystal. Some diamonds have flat, planar faces (glassies) and look dull. Other diamonds have a satin-like surface luster that is often attractive, but kills the internal sparkle. The best crystals for natural diamond jewelry will have complicated crystal faces with striations, trigons, or simply a unique shape that gives them an internal sparkle.
   All diamonds on this page were selected for their natural sparkle.

4. Consider the the color of the surrounding setting when selecting the color of the diamond. It is best to contrast yellow or brown diamonds with a white metal such as platinum, titanium or white gold. Yellow gold settings look best with green,  red, white diamonds.

5. Work with your jewelry designer when designing the final setting to determine the best orientation for the crystal. Rough diamonds are asymmetric and appearance can vary greatly depending on which faces you are looking through. Identify the best faces and then design the setting accordingly. Be orienting the diamond properly you can hide inclusions/flaws, enhance the color, and get maximum sparkle.

#46534, Diamond (0.51 gem-grade yellow dodecahedral crystal), Premier Mine, South Africa (t) $335

#46533, Diamond (0.43 gem-grade pale-yellow complex crystal), Premier Mine, South Africa (t) $275

#46535, Diamond (0.47 gem-grade pale-yellow dodecahedral crystal), Premier Mine, South Africa (t) $295

#46542, Diamond (0.85 carat sherry-colored tetrahexahedral crystal), South Africa (t) $400

#46541, Diamond (0.80 carat green-gray complex crystal), South Africa (t) $445

#46515, Diamond (0.51 carat fancy-yellow complex crystal), South Africa (t) $505

#46532, Diamond (0.88 gem-grade yellow dodecahedral crystal), Diavik Mine, Canada (t) $580

#46536, Diamond (1.28 gem-grade yellow octahedral crystal), Ippy, Central African Republic (t) $1155

#46517, Diamond (1.96 carat gray-brown elongated crystal), Diavik Mine, Canada (t) $485

#46525, Diamond (1.02 carat pale-yellow elongated dodecahedral crystal), Diavik Mine, Canada (t) $550

#46523, Diamond (0.88 carat orange elongated dodecahedral crystal), Letlhakane Mine, Botswana (t) $575

#46538, Diamond (1.01 gem-grade pale-yellow tetrahexahedral crystal), Namibia (t) $580

#46540, Diamond (1.06 gem-grade pale-yellow tetrahexahedral crystal), Namibia (t) $585

#46531, Diamond (0.87 gem-grade yellow elongated dodecahedral crystal), Diavik Mine, Canada (t) $585

#46526, Diamond (0.94 carat orange elongated dodecahedral crystal), Letlhakane Mine, Botswana (t) $590

#46508, Diamond (2.49 carat gem-grade green tetrahexahedral crystal), Aredor Mine, Guinea (t) $4980

#46539, Diamond (1.47 gem-grade pale-yellow tetrahexahedral crystal), Namibia (t) $810

#46524, Diamond (1.00 carat colorless elongated dodecahedral crystal), Diavik Mine, Canada (t) $595

#46530, Diamond (1.63 gem-grade carat pale-yellow octahedral crystal), Diavik Mine, Canada (t) $1075

#46519, Diamond (1.63 carat sherry-colored complex crystal), Diavik Mine, Canada (t) $1075

#46537, Diamond (1.27 gem-grade yellow dodecahedral crystal), Ippy, Central African Republic (t) $1145

#45525, Diamond (0.86 carat yellow complex crystal), Catoca Mine, Angola (t) $665

#45524, Diamond (0.97 carat pale-yellow elongated crystal), Catoca Mine, Angola (t) $745

#45517, Diamond (0.67 carat fancy-yellow elongated crystal), Venetia Mine, South Africa (t) $735

#45520, Diamond (0.74 carat orange dodecahedral crystal), Venetia Mine, South Africa (t) $875

#45523, Diamond (1.03 carat yellow-gray dodecahedral crystal), Venetia Mine, South Africa (t) $1135

#45514, Diamond (3.07 carat brown complex crystal), Damtshaa Mine, Botswana (t) $990

#30191, Diamond (0.67 carat yellow-green octahedral crystal), Orapa Mine, Botswana (t) $425

#38949, Diamond (2.12 carat gem-grade pale-yellow octahedral crystal), Premier Mine, South Africa (t) $3950

#39336, Diamond (2.11 carat gem-grade yellow octahedral crystal), Premier Mine, South Africa (t) $4995

#45727, Diamonds (two brown octahedral diamond crystals, 5.63 carats total), Argyle Mine, Australia (t) $1850

#45518, Diamond (1.37 carat yellow-green octahedral crystal), Venetia Mine, South Africa (t) $1495

#45519, Diamond (1.45 carat orange dodecahedral crystal), Venetia Mine, South Africa (t) $1595

#39513, Diamond (0.88 carat yellow flattened crystal), Mirny, Russia (t) $400

#45522, Diamond (0.62 carat fancy yellow-green dodecahedral crystal), Venetia Mine, South Africa (t) $685

#39867, Diamond (0.89 carat green-yellow flattened crystal), Premier Mine, South Africa (t) $650

#40636, Diamond (0.66 carat pale-green flattened crystal), Premier Mine, South Africa (t) $480

#40792, Diamond (0.91 carat pinkish-gray dodecahedral crystal), Baken Mine, South Africa (t) $500

#38789, Diamond (2.13 carat gem-grade pale-yellow octahedral crystal), Premier Mine, South Africa (t) $3975

#44939, Diamond (2.05 carat gem-grade white complex crystal), Argyle Mine, Australia (t) $6500

#45521, Diamond (1.01 carat orange dodecahedral crystal), Venetia Mine, South Africa (t) $1110

#42354, Diamond (1.13 carat gem-grade yellow-gray elongated complex crystal), Ippy, Central African Republic (t) $1225

#42933, Diamond (1.76 carat cuttable gem-grade yellow octahedral crystal), Brazil (t) $3875

#42932, Diamond (1.91 carat cuttable gem-grade yellow complex crystal), Brazil (t) $4200

#42941, Diamond (1.99 carat cuttable gem-grade yellow complex crystal), Brazil (t) $4375

#30916, Diamond (1.31 carat yellow complex crystal), South Africa (t) $825

#39400, Diamond (9.72 carat brown macle twinned crystal), Guinea (t) $4200

#42943, Diamond (2.22 carat cuttable gem-grade yellow octahedral crystal), Brazil (t) $4895

#35675, Diamond (0.90 carat yellow dodecahedral crystal), Diamantino, Brazil (t) $495

#30191, Diamond (0.67 carat yellow-green octahedral crystal), Orapa Mine, Botswana (t) $425

#46258, Diamond (1.46 carat pale-gray octahedral crystal), Venetia Mine, South Africa (t) $1125

#46263, Diamond (1.39 carat pink-gray elongated crystal), Catoca Mine, Angola (t) $765

#46264, Diamond (0.96 carat gem-grade yellow flattened triangular crystal), Premier Mine, South Africa (t) $795

#46256, Diamond (1.03 carat yellow dodecahedral crystal), Venetia Mine, South Africa (t) $895

#46255, Diamond (1.54 carat yellow hexoctahedral crystal), Venetia Mine, South Africa (t) $1075

#46262, Diamond (1.24 carat gem-grade yellow-gray flattened dodecahedral crystal), Ippy, Central African Republic (t) $820

Check out these other galleries:

Diamonds Priced under $200

Diamond Crystals in unusual crystals and clusters

Diamonds Priced $200 -$399

Diamond Crystals for Natural Diamond Jewelry

Diamonds Priced $400 - $999 

Gem-Grade Diamonds

Diamonds Priced $1000 and above

Jewelry designs with natural uncut diamonds

Opal from Ethiopia

Minerals For Sale

Guided Tour of the Mineral Galleries...

Gem-Grade Diamonds

Diamond Crystal in unusual crystals and clusters