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SI1 Clarity Diamonds

At Brilliance, we offer certified diamonds with a clarity rating of FL (Flawless) to I1 (Included) to ensure the largest selection. SI1 clarity diamonds contain noticeable inclusions under 10x magnification, including clouds, knots, crystals, cavities, and feathers. Any inclusions can be seen with magnification, but will most likely be undetectable to the naked eye. Consumers who choose diamonds with this clarity can maximize their purchase as they are less expensive than diamonds with higher clarity grades but are still good quality.

Shop the selection of SI1 clarity loose diamonds below and narrow your search by choosing additional filters. For assistance, contact a Brilliance diamond and jewelry expert at 866-737-0754.

0.29 Carat Marquise Cut Loose Diamond, D Color, SI1 Clarity, Good Cut, GIA Certified

0.29 Carat Marquise Cut Loose Diamond, D Color, SI1 Clarity, Good Cut, GIA Certified


0.29 carat marquise shape diamond, D color, SI1 clarity, Good cut, GIA certified diamond from Brilliance.
$222
0.33 Carat Marquise Cut Loose Diamond, L Color, SI1 Clarity, Excellent Cut, GIA Certified

0.33 Carat Marquise Cut Loose Diamond, L Color, SI1 Clarity, Excellent Cut, GIA Certified


0.33 carat marquise shape diamond, L color, SI1 clarity, Excellent cut, GIA certified diamond from Brilliance.
$254
0.18 Carat Marquise Cut Loose Diamond, E Color, SI1 Clarity, Excellent Cut, GIA Certified

0.18 Carat Marquise Cut Loose Diamond, E Color, SI1 Clarity, Excellent Cut, GIA Certified


0.18 carat marquise shape diamond, E color, SI1 clarity, Excellent cut, GIA certified diamond from Brilliance.
$254
0.18 Carat Marquise Cut Loose Diamond, G Color, SI1 Clarity, Ideal Cut, GIA Certified

0.18 Carat Marquise Cut Loose Diamond, G Color, SI1 Clarity, Ideal Cut, GIA Certified


0.18 carat marquise shape diamond, G color, SI1 clarity, Ideal cut, GIA certified diamond from Brilliance.
$255
0.30 Carat Marquise Cut Loose Diamond, I Color, SI1 Clarity, Super Ideal Cut, EGL Certified

0.30 Carat Marquise Cut Loose Diamond, I Color, SI1 Clarity, Super Ideal Cut, EGL Certified


0.30 carat marquise shape diamond, I color, SI1 clarity, Super Ideal cut, EGL certified diamond from Brilliance.
$272
0.28 Carat Princess Cut Loose Diamond, J Color, SI1 Clarity, Good Cut, GIA Certified

0.28 Carat Princess Cut Loose Diamond, J Color, SI1 Clarity, Good Cut, GIA Certified


0.28 carat princess shape diamond, J color, SI1 clarity, Good cut, GIA certified diamond from Brilliance.
$272
0.23 Carat Princess Cut Loose Diamond, E Color, SI1 Clarity, Good Cut, GIA Certified

0.23 Carat Princess Cut Loose Diamond, E Color, SI1 Clarity, Good Cut, GIA Certified


0.23 carat princess shape diamond, E color, SI1 clarity, Good cut, GIA certified diamond from Brilliance.
$282
0.24 Carat Asscher Cut Loose Diamond, E Color, SI1 Clarity, Very Good Cut, GIA Certified

0.24 Carat Asscher Cut Loose Diamond, E Color, SI1 Clarity, Very Good Cut, GIA Certified


0.24 carat asscher shape diamond, E color, SI1 clarity, Very Good cut, GIA certified diamond from Brilliance.
$294
0.25 Carat Emerald Cut Loose Diamond, M Color, SI1 Clarity, Ideal Cut, GIA Certified

0.25 Carat Emerald Cut Loose Diamond, M Color, SI1 Clarity, Ideal Cut, GIA Certified


0.25 carat emerald shape diamond, M color, SI1 clarity, Ideal cut, GIA certified diamond from Brilliance.
$308
0.18 Carat Round Cut Loose Diamond, D Color, SI1 Clarity, Excellent Cut, GIA Certified

0.18 Carat Round Cut Loose Diamond, D Color, SI1 Clarity, Excellent Cut, GIA Certified


0.18 carat round shape diamond, D color, SI1 clarity, Excellent cut, GIA certified diamond from Brilliance.
$310

Diamond Clarity

Inclusions are nature's birthmarks, the characteristics - or lack thereof - that make every diamond unique. The fewer inclusions and blemishes a loose diamond has, the better its clarity, and the more rare and valuable it is. Flawless diamonds containing no inclusions are extremely rare and consequently more expensive. Diamonds that contain flaws that are undetectable without magnification make up the majority of certified diamonds.

Clarity Scale

Diamond Clarity is graded in certified diamonds on a scale ranging from FL (flawless) to I3 (included) and is based on the size, number, and location of characteristics in a diamond.

  • FL, IF (Flawless, Internally Flawless): No internal or external inclusions when viewed with 10x magnification. Internally Flawless diamonds may contain external characteristics.
  • VVS1, VVS2 (Very Very Slightly Included): Contains minute inclusions that are extremely difficult to locate under 10x magnification.
  • VS1, VS2 (Very Slightly Included): Contains minute inclusions, such as clouds, crystals, or feathers, which are difficult to locate with 10x magnification.
  • SI1, SI2, SI3 (Slightly Included): Noticeable inclusions under 10x magnification, including clouds, knots, crystals, cavities, and feathers.
  • I1, I2, I3 (Included): Contains very obvious inclusions under 10x magnification. Usually can be seen with the naked eye. Clarity might also impede transparency and affect brilliance.

Inclusions are made up of internal and external characteristics. Internal characteristics are called inclusions and the most common inclusions are crystals, clouds, and feathers. External characteristics, or surface irregularities, are called blemishes. As most inclusions are invisible to the unaided eye, gemologists use a ten-power (10x) microscope to rate clarity.