YEHUDA Dr. Watson, User Manual

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5

IMPORTANT DETECTION GUIDELINES 

IMPORTANT DETECTION GUIDELINES 

(CONT)

(CONT)

(Detailed instructional videos are also available.)

ACCORDING TO THE SCIENCE KNOWN TODAY:

•  If a diamond shines in blue in the 

LONG UV

 test results, it is a 

100% NATURAL

 diamond.

•  If a diamond shines very strongly in a non-blue color in the 

LUV TEST

- it is a  

natural diamond as well.

• 

If it shines in very light non blue color – it may be a natural diamond OR a lab grown diamond. 

In this case the 

LUV TEST

 did not help us.

If a diamond was determined to be a natural diamond at the long UV test,  it is 100% natural diamond! 
Even if it gave a lab grown diamond result in the RESULT picture. This means that when you get a lab 

grown diamond test result – 

YOU ARE NOT DONE

. It is therefore critical that 

YOU ALWAYS CHECK

THE LONG UV PICTURE TO MAKE YOUR FINAL DETERMINATION.  

GLOWING PICTURE

:

Some LAB GROWN DIAMONDS show phosphorescence. (Emit light “glow” after the light source is 
shut off.) If a diamond shines after the light is shut off – it is a lab grown diamond.

COLORED PICTURE:

When our proprietary lamp emits light on the diamonds, they fluoresce in different colors. 

ORIGINAL PICTURE:

This is the untouched picture of the diamonds and jewelry that you are testing.   

RESULT PICTURE:

This is the default picture that you see when the test has been completed. It is a combination of the 
COLORED picture and the GLOWING picture.

•  If the diamond fluoresces 

100% BLUE

 - it is always a 

NATURAL

 diamond.

•  If the diamond fluoresces in any other color but blue, and/or is painted in red - 

  it is a 

LAB GROWN

 diamond.

•  If the diamond is painted in red, even if the diamond fluoresces in blue, 

  it is a 

LAB GROWN

 diamond.

To simplify this for you, our software identifies the diamonds that glow in the dark or show 
phosphorescence, and paints them in a distinctive bright red color in the 

RESULT

 picture. 

Even though our software paints these diamonds red in the 

RESULT 

picture, sometimes the painting 

is too strong or very light. We suggest to always go to the 

GLOWING

 picture to understand which 

diamonds glow in the dark (show phosphorescence). For your convenience, at the bottom of the 
RESULT picture you can change the amount of red painting by pressing the sensitivity buttons.

In order to be more accurate and reduce the false positive rate, you 

MUST

 always also look at the 

LUV

 and 

GLOWING

 pictures before making your final determination.

NOTE:  BLACK IS NOT CONSIDERED A COLOR.