Global What is the specific gravity of precious metals and how does it affect the price

What is the specific gravity of precious metals and how does it affect the price


Have you acci­den­tal­ly seen a beau­ti­ful ring made of plat­inum and you intend to get a copy of it, but in the gold ver­sion of the pre­cious met­al? Or do you want to dupli­cate 585 gold ear­rings from raw plat­inum? Mod­ern jew­el­ers will be able to ful­fill any whim, but at the same time, the price for the work can be an unex­pect­ed sur­prise for the cus­tomer. With such a break­down, both the cost of a gram of met­al and its spe­cif­ic grav­i­ty play a sig­nif­i­cant role.

What it is?

Pre­cious met­als in nature are prac­ti­cal­ly not observed in their purest form. As a rule, their com­po­si­tion includes var­i­ous impu­ri­ties that direct­ly affect the final price of jew­el­ry prod­ucts made from such raw mate­ri­als.

The alloy, where a small num­ber of oth­er addi­tions are observed, is char­ac­ter­ized by a high­er proof — 999. From this fol­lows the con­clu­sion that, for exam­ple, gold of 999 proof should have a greater val­ue than oth­er alloys. And it is this gold that will set the tone for pric­ing per gram of all pre­cious met­als.

Key features

Each of the pre­cious met­als has cer­tain phys­i­cal and mechan­i­cal para­me­ters. It is these indi­ca­tors that allow spe­cial­ists to mark their so-called spe­cif­ic grav­i­ty. All jew­el­ry of iden­ti­cal vol­ume, made of dif­fer­ent met­als, dif­fer in weight. The den­si­ty of each indi­vid­ual alloy is deter­mined by a spe­cial for­mu­la and has a great influ­ence on the cal­cu­la­tion of the spe­cif­ic grav­i­ty of the met­al.

At the same time, it is worth not­ing that it is very imprac­ti­cal to make jew­el­ry from pure met­al. For exam­ple, gold and sil­ver are char­ac­ter­ized by exces­sive soft­ness, and there­fore they need improve­ment. By increas­ing strength and wear resis­tance, chang­ing the tonal­i­ty of col­or, spe­cial­ists direct­ly affect the sam­ple of raw mate­ri­als, which ulti­mate­ly affects the final cost of the fin­ished jew­el­ry.

Indicators of the specific weight of the most popular precious metals

If we talk about the phys­i­cal char­ac­ter­is­tics of pre­cious met­als, then in this case you should pay atten­tion to the fol­low­ing para­me­ters:

  • strength;
  • elec­tri­cal and ther­mal con­duc­tiv­i­ty;
  • plas­tic­i­ty;
  • bright­ness and char­ac­ter­is­tic shine.

It is the mea­sure­ment of these indi­ca­tors that is tak­en into account when work­ing with alloys in jew­el­ry. Not­ing the most com­mon met­als used as the main raw mate­ri­als, the fol­low­ing can be not­ed:

Gold is char­ac­ter­ized by a high degree of den­si­ty and heav­i­ness, which auto­mat­i­cal­ly puts it in 7th place among oth­er met­als. As already men­tioned, its only draw­back is soft­ness, which is “cor­rect­ed” by adding var­i­ous impu­ri­ties. It must be said that due to the high spe­cif­ic grav­i­ty of gold, its extrac­tion is quite prof­itable.

This met­al, extreme­ly resis­tant to cor­ro­sion, is char­ac­ter­ized by low resis­tance. Despite the fact that it, like gold, is soft, its spe­cif­ic grav­i­ty and den­si­ty are also quite high.

  • plat­inum - the spe­cif­ic grav­i­ty of this met­al is con­sid­ered one of the high­est — 21.45 g per cubic cen­time­ter.

Among oth­er things, it is char­ac­ter­ized by increased fire resis­tance and at the same time does not under­go defor­ma­tion process­es. The unique char­ac­ter­is­tics of plat­inum make it pos­si­ble to make alloys with a high con­tent of plat­inum in fin­ished prod­ucts.

Spe­cial tables of the den­si­ty of met­als and alloys allow jew­el­ers to accu­rate­ly deter­mine the future price of the prod­uct with which they have to work. These data are well known to spe­cial­ists, but not always known to ordi­nary con­sumers.


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