1 oz gold coin dimensions
 

So here's a question I have for all of you.
Say i have 2 gold coins:
1) 1 1-oz Australian Lunar series II 1 oz tiger (9999 pure)
2) 1 1-oz Austrian Philharmonic (9999 pure).

The dimensions as I could find on the web:
Lunar: 38mm x 3mm
Philly: 37mm x 2mm

How are both coins 1oz of 9999 gold but the lunar is wider and thicker than the philly? :confused_ma:

Here's a pic I took...the lighter-yellow-gold crescent on top is the lunar.
http://i879.photobucket.com/albums/a...ucket/coin.jpg

due to plastic, I can't really take a pic of the sides.

Re: 1 oz gold coin dimensions
 

the Lunar has a creamy helium filling ? :spam4:

is the detail on the Lunar more raised, so that the thickness of the cylindrical piece of gold that makes up most of the weight is less than the thickness on the Philharmonic ?

Re: 1 oz gold coin dimensions
 

You specs are off a bit. Here's a site that lists the specs.

Below is a print screen showing the correct values. Click on it to open it up. The phil is much larger in diameter but thinner than the lunar.

Re: 1 oz gold coin dimensions
 

At the risk of starting a riot, Ive got to ask.... you dint happen to get that Philharmonic from The Skeptic did you?

Re: 1 oz gold coin dimensions
 

Didn't get it from the skeptic.
And TomD, those specs seems like there for the Lunar I series. I was comparing it to the Lunar II series which is wider and thinner than series I

Re: 1 oz gold coin dimensions
 

You're right but either way 28mm x 3mm isn't right.

Re: 1 oz gold coin dimensions
 

GoldenE: Got Calipers?

Re: 1 oz gold coin dimensions
 

TomD, you're right. Those were typos on my part. My bad. should have been 38mm for lunar and 37 for philly. (from what I can find on the internet)

No calipers...plus the lunar is in an air-tite so I don't think it will help.

Re: 1 oz gold coin dimensions
 

Air-tite is a misnomer. Fingernail-tite is more like it. Perth tites have an indentation for the nail to grab. Cotton respects the metal and forsakes the skin. No calipers is a deadly sin of the gold buyer. If you want to do some math you need to be able to make some field measurements.

Re: 1 oz gold coin dimensions
 

Well, i'll pick up calipers then :-) but that might be a couple days.
Thanks for the advice.

Re: 1 oz gold coin dimensions
 

Yeah, I take Lunars out of the containers all the time for photography.

Re: 1 oz gold coin dimensions
 

LOl, when I first read the first post, I too thought about the Skeptic and another onw of those threads!

Calipers-

I use an EMPIRE 6" Dial caliper that was originally purchased for automotive use. They can be found at Sears or Home Cheapo pretty inexpensivly.

Re: 1 oz gold coin dimensions
 

Well, usually dimensions refer to the maximum thickness and maximum diameter (in some cases are instead minumum measures, in other cases there are tollerance measures in the official data).
Hence coins with high relief and/or deeply reeded border can result in apparently very large dimensions compared with coins more plain. What you have to measure is the volume of the coin: for coins of the same material and same weight, the volume has to be the same.

Re: 1 oz gold coin dimensions
 

Ah yes, measure the volume. And now the $64 question and to see just how well you've been keeping up with GIM, how does one accurately measure the volume? Note: weight/volume=specific gravity (density).

Re: 1 oz gold coin dimensions
 

http://www.fisch.co.za/home.htm

You are in LUCK they just added in your COIN...

HS :23_28_100s:

Re: 1 oz gold coin dimensions
 

Say, are we gonna be breaking out the micrometer for this one.

http://goldismoney.info/forums/pictu...849164&thumb=1

:452:

After the Skeptic's thread I thought a little humor was required. :signs14:

Re: 1 oz gold coin dimensions
 

You are getting almost as bad as I.

:36_1_34::36_1_34::getdown:

Re: 1 oz gold coin dimensions
 

Skeptic - MVHO is that he's in the POKEY...

just kidding....

:signs14::504:

Re: 1 oz gold coin dimensions
 

I haven't gotten calipers yet....work's been busy and it's been snowy.

If i remember correctly from 10th grade chemistry...density = mass/volume.

Just tell me now off the bat if I'm gonna have to be putting these coins in water and measure the displacement. :no_ma:

Re: 1 oz gold coin dimensions
 

I think the probability of someone going through the huge amount of trouble to make a very good counterfeit and then duplicate a relatively rare coin with very little premium is close to zero. Given that, I measure all my gold coins just on general principles.

Below are the specs of the new gold lunar series. Notice the thickness is shown as "maximum", probably at the rim. If yours is the same size and weight, don't worry about it. The only reason there was all that fuss about Archimedes principle was to prove or disprove an extraordinary claim of fake Philharmonics made from 90% gold.

Re: 1 oz gold coin dimensions
 

So i got some calipers today and too some measurements...i hope accurately.

Philly:
diameter: 36.7 mm
width: 1.7 mm

Tiger Lunar II:
diameter: 38.4 mm
width: 1.9 mm

The philly seems pretty close to what was posted above (37.0 x 2.0)
The Lunar seems to be under though (39.34 x 2.5)

I'm not really questioning the authenticity of the coins (i hope)...but am I getting more gold by buying lunars (wider and thicker)?

Re: 1 oz gold coin dimensions
 

A troy ounce is a troy ounce, no?

Re: 1 oz gold coin dimensions
 

14.6 troy ounces to the NORMAL pound.

thereby a 100 ounce silver bar weights about = 6.849315 pounds...

a 1000 ounce bar (who would want one?) weights about

68.49315 pounds. Carry that puppy around for a year :ok: and you'd look like our Arnie the CA Govenor before he went to pot. That did not sound right.

Re: 1 oz gold coin dimensions
 

I've found that there is a lot of variability in the spec "coin thickness". It could be die wear. I'm pretty sure that quality control spends a lot of effort with .999 gold planchets to insure weight to within very small limits. If the dies are old, the "relief" of the design would be worn somewhat from newer dies, resulting in less gold being displaced in the stamping process. The only place displaced gold has too go is to the rim thickness.

That's my theory and I'm sticking to it.