The Menorah (The Lampstand), its Seven Golden Lamps and its Golden Utensils were all made out of one (1) Talent of pure gold.
Exodus 25:39
39 Of a talent of pure gold shall he make it, with all these vessels.
39 כִּכָּ֛ר זָהָ֥ב טָה֖וֹר יַעֲשֶׂ֣ה אֹתָ֑הּ אֵ֥ת כָּל־הַכֵּלִ֖ים הָאֵֽלֶּה׃
As you can see, the entire Lampstand was made out of a relatively small piece of gold.
( 1 Gold Talent is a larger cube on the picture)
(three smaller cubes are for comparison and are equal to one large cube)
One(1) Gold Talent weight is equal to 30-34kg, and has volume of approximately 12 cubic cm. As of this posts' date, the price tag of this Lampstand its Lamps and Utensils would stand at around $1.2 USD. You can use one of the online calculators to see for yourself -
this one, for example.
Three little cubes on the picture represent a standard 400oz golden bars 12.4kg each, with a price tag of $430k each.
And in case you are wondering how such a small volume of metal (gold) could be forged into something that looks that big, you can re-read
my previous post on characteristics of gold or
this wiki article.
Let me also point out a few things about the shape of the Menorah:
Exodus 25:40
40 And look that thou make them after their pattern, which was shewed thee in the mount.
40 וּרְאֵ֖ה וַעֲשֵׂ֑ה בְּתַ֨בְנִיתָ֔ם אֲשֶׁר־אַתָּ֥ה מָרְאֶ֖ה בָּהָֽר׃ ס
Whereas I cannot claim that my reconstruction of the Lampstand is 100% correct, it nevertheless does include all details that are at least outlined directly in the original text.
The following images are the most common, but, obviously, incorrect representations of the Menorah:
This one lacks 3 flowers on top of the Stem.
This one also lacks 3 flowers on top of the Stem. It also has straight branches.
And this is not a Menorah at all, but a Hanukiah - a nine-branched candelabrum.
Therefore, these three examples can be considered only as an artistic representations of an actual Menorah.
(UPDATE 08/17/2010) Please note, that I'm not sure about the weight of 1 Talent of Gold being ~34kg. It seems to me that the weight of 1 Talent of Gold should be equivalent to that of 1 Talent of Silver (as per. Ex.38:24). I'm still working on figuring out the proper conversion table for these units.