Learning your 4 C’s will help you to evaluate our exquisite and valuable diamonds. We are pleased to offer our customers the opportunity to build a viable Collection of lasting keepsakes that can be enjoyed and treasured forever.


  • The unit of measure for weighing diamonds and other precious stones
  • 100 points equals 1 carat
  • 50 points is ½ of a carat
  • 5 carats equals 1 gram
  • Larger stones are valued for their rarity
  • Weight does not have any bearing on the quality
  • The price of two diamonds of similar weight may vary due to differences in Cut, Color, and Clarity

  • Clarity grade

  • Diamonds have traces of their growth history
  • Clarity is determined by minute internal & external characteristics in gem-quality diamonds
  • When diamonds are examined with a loupe 10x, the clarity scale reflects the size, number, location, and visibility of the characteristics
  • Most inclusions cannot be seen by the naked eye
  • Diamonds that have no inclusions that are visible to the naked eye have excellent value

  • Color

  • Diamonds can be any color of the rainbow
  • The best diamond has no color
  • Red diamonds are the least often found but are the most valuable
  • The color range of diamonds usually varies from colorless which is more valuable to the shadings that are yellow to brown
  • Most diamonds are colorless to light yellow
  • The deepest shades of yellow, pink, purple, red, and blue are called Fancy Diamonds
  • The absence or presence of nitrogen as it is dispersed throughout the carbon atom determines the color of the diamond
  • Through comparison with a series of master stones, the color grade is determined, the best grade being colorless
  • The finest white Diamond has no body color of nitrogen with the yellow to darker shaded stones having higher amounts of this gas

  • Cut – proportions and finish grade

  • A Diamond’s Fire, Brilliancy, & Scintillation are largely determined by the Proportions of various parts of the stone
  • The Symmetry is mainly evaluated by the Finish Grade
  • Diamonds can be cut in various Shapes such Square, Pear, Heart, and Round Brilliant which is the best-known Shape
  • The Fire and Sparkle of a Diamond will dramatically influence how it is Cut.
  • It is the Cut of a Diamond that enables it to make the best use of light
  • The proportions of a Brilliant Cut Diamond give it Fire and every facet has to be within certain tolerances

  • P.O. Box 410059
    San Francisco, CA 94141-0059
    415-255-8977 office
    415-255-8926 fax
    Email address: [email protected]