According to the AGL site, an E1 stone should be avoided. The notation indicates that the stone is Excessively Included.
"Excessively Included (E) gems have durability problems and should be avoided."
There are 63 e1's in sdh STM-1 = 63 x E1; STM-4 = 63 x 4 E1; STM-16 = 63 x 16 E1; STM-64 = 63 x 64 E1.
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Yes, if it is a gem-stone quality diamond.
Depends on the quality of the diamond in question.
(E1 - E2)/E1 where E1 is the original expense and E2 is the new, lower expense.
The 'best quality diamond' is the diamond that you can afford. If you want an investment quality diamond -- which some consider the 'best', look for a fancy intense coloured or a D colour diamond, or a Flawless or Internally Flawless diamond with an excellent cut in the shape and carat size that you want. Your trusted local jeweler can sell it to you.
One can find information on diamond quality by going to the To Diamonds website. The website has information on how to buy diamonds and what to look for in a diamond.
Your answer depends on the quality and number of diamond(s) set in the metal and the quality of the metal.
STM-0= 21 E1 lines STM-1=(64x1) - 1 = 63 E1 lines STM-4=(64x4) - 4 = 252 E1 lines STM-16=(64x16) - 16 = 1008 E1 lines STM-64=(64x64) - 64 = 4032 E1 lines and so on
Facets on a diamond can be one measure of a stone's quality. For instance, if the facets are aligned well then you probably have a quality cut.
E1 is the paygrade. The rank of an E1 is private, the insignia -- well, there is none, no stripes, no rockers. Are you asking, "What is the pay received by an E1?" If so, the base pay of an E1 is $1347.00 per month. You can look it up here: http://www.militaryfactory.com/military_pay_scale.asp
Not necessarily. The speed of the diamond tester's beeping indicates the thermal conductivity of the stone, not its quality. A higher quality diamond may or may not beep faster, as factors like size and shape can also affect the speed of the beep.