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Community Member
Posts: 10
Registered: ‎08-13-2009

Re: How accurate is a Presidium Gem Tester?

in reply to thatjazzcat

Cubic Zirconia is NOT the same as the gem Zircon.

 

Community Member
Posts: 4
Registered: ‎12-26-2015

Re: How accurate is a Presidium Gem Tester?

in reply to lve2havjewels

great advice - very well spoken!

Community Member
Posts: 4
Registered: ‎12-26-2015

Re: How accurate is a Presidium Gem Tester?

in reply to bojibelle

synthetics are not necessarily flawless!  You need to do a little research on that - they do have imperfections in them but there may be fewer of them and different types.

Community Member
Posts: 4
Registered: ‎12-26-2015

Re: How accurate is a Presidium Gem Tester?

in reply to brunosfinejewelry

I agree 100% - bravo!

Community Member
Posts: 4
Registered: ‎12-26-2015

Re: How accurate is a Presidium Gem Tester?

in reply to brunosfinejewelry

the termanology of "lab created" and "synthetic" can actually can be one in the same as a synthetic is in fact lab grown/created  has the same eliments as the earthmined mineral componants.  The secret is to clarify that the material is in fact synthetic oposed to IMITATION.  This can confuse peeps and does.


brunosfinejewelry wrote:
Synthetic is not Lab-Created. Labs have the same properties as a genuine mined gem.

 

Community Member
Posts: 258
Registered: ‎12-11-2015

Re: How accurate is a Presidium Gem Tester?

in reply to manhk.ytpye

I  G U E S S  I T  P R O B A B L Y  I S  C H R Y S O P R E S E .   I  O N C E  H A D  A  M A W S I T S I T  T E S T  A S  L A R I M A R.   I T  T U R N E D   O U T  T O  B E  M A W S I T S I T .

Community Member
Posts: 85
Registered: ‎06-14-2006

Re: How accurate is a Presidium Gem Tester?

in reply to danser4hm7a9r
Check their website and mail Presidium. They are in Singapore and very helpful with tech support.
Community Member
Posts: 1
Registered: ‎08-20-2015

Re: How accurate is a Presidium Gem Tester?

in reply to danser4hm7a9r
@jura1755 - Judy
I have recently bought presidium gem tester. I have checked diamond,ruby, onyx etc the result is perfect and can see the needle stop on the exact gem name on screen but when I try to check the nephrite jade then it stops at chrysoprese. How can I check nephrite on presidium gem tester.
Community Member
Posts: 1,058
Registered: ‎01-11-2009

Re: How accurate is a Presidium Gem Tester?

in reply to joshua_b-52

joshua_b-52 wrote:

I found a nice looking rock once.  It looked like a diamond but it was too clear for me to feel comfortable.  I was going to put it back because I couldn't find an inclusion under magnification even though I simply loved it's sparkle.  I'd never seen anything, not even zarconia, sparkle like that rock in my life though so I thought I'd take another look.  Nothing sparkled like that rock in the sunlight. two different types of stone testers consistently said it was a diamond and when I tried to fog it up it would be gone in a second, it scratched glass (not that it matters much, a lot of stones scratch glass).  I increased the magnification to be sure from 8 to 16 and looked again, I looked through every facet and found an inclusion and the likely source of the unusually brilliant sparkle other than it's nice symmetry and the way the faces line up so well with each other.  There was an extremely fine line of silk in the bottom of that 1 ct stone that went almost all the way across the bottom.  I left it there and thought about it and did some more research, he wanted a pretty penny for the stone in my opinion for something his IGS certificate said was just an H, although I think it might be a bit closer to F; maybe a G but I am not completely sure.  It was a loose stone so I bought it, I'm not sure what I'm going to do with it yet, I'll probably put it in a ring, for now it's just a loose stone.  I picked up two half carat supposed blue diamonds from the same guy, they looked good and I thought I'd have them placed beside the white diamond some day.  I'm not sure if I'll ever get them mounted or what I'll put them in.  I was just looking for some colored stones when I walked in, I don't normally deal with diamonds because there are too many fakes but I loved that stone's sparkle and fire, when it's being moved the sparkle can blind you with dazzaling colors, mostly orange, red, and yellow but there was a little blue and red if I remember right.  I don't remember seeing any green and I don't really remmeber hardly any blut, all I can remember for the most part is red, yellow, and orange.  I'll have to take a look at it again some sunny day. 


 

 

 

 

 

 

 

I know all of the SQL injection part. I can't figure out the bios part. How it changes "setup" after a clean re-install.

___________________________________________________
Some should name the chip that resides on their shoulder "Hypocrite"
Community Member
Posts: 1,058
Registered: ‎01-11-2009

Re: How accurate is a Presidium Gem Tester?

in reply to joshua_b-52

joshua_b-52 wrote:

I found a nice looking rock once.  It looked like a diamond but it was too clear for me to feel comfortable.  I was going to put it back because I couldn't find an inclusion under magnification even though I simply loved it's sparkle.  I'd never seen anything, not even zarconia, sparkle like that rock in my life though so I thought I'd take another look.  Nothing sparkled like that rock in the sunlight. two different types of stone testers consistently said it was a diamond and when I tried to fog it up it would be gone in a second, it scratched glass (not that it matters much, a lot of stones scratch glass).  I increased the magnification to be sure from 8 to 16 and looked again, I looked through every facet and found an inclusion and the likely source of the unusually brilliant sparkle other than it's nice symmetry and the way the faces line up so well with each other.  There was an extremely fine line of silk in the bottom of that 1 ct stone that went almost all the way across the bottom.  I left it there and thought about it and did some more research, he wanted a pretty penny for the stone in my opinion for something his IGS certificate said was just an H, although I think it might be a bit closer to F; maybe a G but I am not completely sure.  It was a loose stone so I bought it, I'm not sure what I'm going to do with it yet, I'll probably put it in a ring, for now it's just a loose stone.  I picked up two half carat supposed blue diamonds from the same guy, they looked good and I thought I'd have them placed beside the white diamond some day.  I'm not sure if I'll ever get them mounted or what I'll put them in.  I was just looking for some colored stones when I walked in, I don't normally deal with diamonds because there are too many fakes but I loved that stone's sparkle and fire, when it's being moved the sparkle can blind you with dazzaling colors, mostly orange, red, and yellow but there was a little blue and red if I remember right.  I don't remember seeing any green and I don't really remmeber hardly any blut, all I can remember for the most part is red, yellow, and orange.  I'll have to take a look at it again some sunny day. 


 

 

 

C'mon,,,,,I need some more clues "Sunshine"  You need to remember I have come a long way in almost 4 years. "Persistant" i would say,,,,Would you not?????

___________________________________________________
Some should name the chip that resides on their shoulder "Hypocrite"
Community Member
Posts: 1,058
Registered: ‎01-11-2009

Re: How accurate is a Presidium Gem Tester?

[ Edited ]
in reply to bwrighttwo

< mattmo mattmo were you been? p><UI Name="Main" BaseUI="me:MyBaseUI">
<Properties>
<Color Name="BackgroundColor" Color="DarkGreen" />
</Properties>

<Content>
<Text Content="The background color from the base UI is overridden."
Color="[TextColor]" BackColor="[BackgroundColor]" Font="[BasicFont]" />
</Content>
</UI>

<UI Name="MyBaseUI" >
<Properties>
<Color Name="BackgroundColor" Color="DarkRed" />
<Color Name="TextColor" Color="PaleGoldenrod" />
<Font Name="BasicFont" FontName="Verdana" FontSize="16" FontStyle="Italic" />
</Properties>
</UI>

 

___________________________________________________
Some should name the chip that resides on their shoulder "Hypocrite"
Community Member
Posts: 1,058
Registered: ‎01-11-2009

Re: How accurate is a Presidium Gem Tester?

in reply to joshua_b-52
What about 12bit?
___________________________________________________
Some should name the chip that resides on their shoulder "Hypocrite"
Community Member
Posts: 1,058
Registered: ‎01-11-2009

Re: How accurate is a Presidium Gem Tester?

in reply to thatjazzcat
Yes interesting. I think there is much more to this post than you see. I am quite sure it has nothing to do with gemstones or jewelry.
___________________________________________________
Some should name the chip that resides on their shoulder "Hypocrite"
Community Member
Posts: 2
Registered: ‎12-04-2003

Re: How accurate is a Presidium Gem Tester?

in reply to joshua_b-52

Intersting and yet, I hae never heard of zarconia.  Could you perhaps mean a zircon?  And also, I don't see any refernce to the gem tester so why did you write this piece?

 

Thanx TJC

Community Member
Posts: 1
Registered: ‎04-11-2015

Re: How accurate is a Presidium Gem Tester?

in reply to brunosfinejewelry

I found a nice looking rock once.  It looked like a diamond but it was too clear for me to feel comfortable.  I was going to put it back because I couldn't find an inclusion under magnification even though I simply loved it's sparkle.  I'd never seen anything, not even zarconia, sparkle like that rock in my life though so I thought I'd take another look.  Nothing sparkled like that rock in the sunlight. two different types of stone testers consistently said it was a diamond and when I tried to fog it up it would be gone in a second, it scratched glass (not that it matters much, a lot of stones scratch glass).  I increased the magnification to be sure from 8 to 16 and looked again, I looked through every facet and found an inclusion and the likely source of the unusually brilliant sparkle other than it's nice symmetry and the way the faces line up so well with each other.  There was an extremely fine line of silk in the bottom of that 1 ct stone that went almost all the way across the bottom.  I left it there and thought about it and did some more research, he wanted a pretty penny for the stone in my opinion for something his IGS certificate said was just an H, although I think it might be a bit closer to F; maybe a G but I am not completely sure.  It was a loose stone so I bought it, I'm not sure what I'm going to do with it yet, I'll probably put it in a ring, for now it's just a loose stone.  I picked up two half carat supposed blue diamonds from the same guy, they looked good and I thought I'd have them placed beside the white diamond some day.  I'm not sure if I'll ever get them mounted or what I'll put them in.  I was just looking for some colored stones when I walked in, I don't normally deal with diamonds because there are too many fakes but I loved that stone's sparkle and fire, when it's being moved the sparkle can blind you with dazzaling colors, mostly orange, red, and yellow but there was a little blue and red if I remember right.  I don't remember seeing any green and I don't really remmeber hardly any blut, all I can remember for the most part is red, yellow, and orange.  I'll have to take a look at it again some sunny day. 

Community Member
Posts: 798
Registered: ‎11-15-2004

Re: How accurate is a Presidium Gem Tester?

in reply to brunosfinejewelry

HITH does anyone synthesize a stone w/o creating it in a lab?

 

It's a common error. People confuse synthetics with *imitations*. Synthetics are always lab. Imitations, often but not always so - such as rock crystal being a diamond imitator. S'why it's sometimes known as "Herkimer diamond."

 

 

Community Member
Posts: 10
Registered: ‎08-13-2009

Re: How accurate is a Presidium Gem Tester?

in reply to rixstuff
Synthetic is not Lab-Created. Labs have the same properties as a genuine mined gem.
Community Member
Posts: 10
Registered: ‎08-13-2009

Re: How accurate is a Presidium Gem Tester?

in reply to bojibelle

If it looks too good to be true - it probably is. Too Sparkly, Too White, etc. Only a trained eye can tell if it is a diamond. Someone who looks as diamonds often enough can tell. Refraction, inclusions, cloudiness, etc. Even a Moisonite tester is not 100%. Machine Testers are nice but donot take the place of the trained eye which takes a long time to truely develop. No GIA course in the world can teach you fully. This is where experience & viewing gems regularly can only truely teach. So Machines & Book Courses are great only for guides. Experience can't be beat.

Community Member
Posts: 1,058
Registered: ‎01-11-2009

Re: How accurate is a Presidium Gem Tester?

in reply to minini1

minini1 wrote:
There is no accurate gem tester on the market. The only way to use them is in reverse, eg. if it says gem is genuine, it is not and vise versa. I have had clients call me crying saying they were told all their diamonds from heirlooms & wedding ring were fake. I asked them how were they tested, they said with a diamond tester at the jewelers. They drove 100 miles to show me the jewelry and they were all genuine, nice diamonds. As soon as they told me that I told them they're all real and no "jeweler" would have one of those a mall jewelry store might. Recently also had a lady bring me in her pot metal watch encrusted with glass foilbacks which they were told by a fake jeweler they were real. Happened more times than I can remember.

 

 

I agree that these type of testers are not fail safe. I will say that most of the issues you are describing are not common and usually caused by ignorance, abused or old well used testers, bad eyesight or even customers that like to make up stuff. When not abused or overused these testers will get it right most of the time.  As far as the Moissanite testing goes, If you can't tell the difference without one you should not be assessing one anyway.  I am curious to see what happens when more of the new man made Diamonds hit the market.   

___________________________________________________
Some should name the chip that resides on their shoulder "Hypocrite"
Community Member
Posts: 17
Registered: ‎10-08-2007

Re: How accurate is a Presidium Gem Tester?

in reply to finerflavorantiques
Yes those instruments are scientific and work. The gem testers talked about here are about as scientific as using a stick to find water. Sometimes you'll get correct reading and even a blind squirrel finds an acorn once in a while. Is GIA still offering the mail order course where they send you the work books with the answers in the back?