Greetings!


Gold inspection includes: 
     ●    Visual  identification  of the product by  an  operator –  coin,  ingot, jewelry, raw gold or gold granules 
     ●    Evaluation via spectrography using the spectrograph installed within the box   
     ●    Evaluation and weighing of gold via hydrostatic weighing   

Custody  Bot  uses  the  technologies  of  spectral  analysis  and  hydrostatic  weighing  to  inspect the value  of the  gold.  In the  absence  of  a  single  standard,  a  specialist  also manually inspects the jewelry before Custody Bot conducts spectral analysis.

Spectral analysis: the process:
Custody  Bot  uses  fluorescence  spectroscopy,  a  type  of  electromagnetic  spectroscopy  that analyzes  fluorescence  from  a  sample.  This technique  involves using  a beam  of  light, usually ultraviolet light, that excites the electrons in molecules of certain compounds and causes them to  emit  light.  An  analyzer  crystal  disperses  radiation  onto  the  gold  via  a  detector.  A computer-controlled  precision   goniometer  moves  the  analyzer  crystal  and  detector  and controls the position, intensity and lengths of secondary radiation waves. Concentration of the analysis is calculated by comparison with known standard samples. 

Hydrostatic weighing: the process: 
Hydrostatic  weighing  determines  the  density  of  the  gold  and  is  done by weighting the  item first  in  air  then  liquid  and  calculating  the  combined  private  density  (ρ2). Estimation  of density is made by contrasting the density of gold to densities of other metals. 

The  initial weighting  lets  define the valuable’s weight (m1) and the second one lets detemine the volume: V=(m1-m2)/ρ2.


Custody Bot is GoldMint's unique device. It is programmed for temporary holding, inspection, long-term storing and conveying of gold jewelry, coins or gold.


Custody Bot uses the technologies of spectral analysis and hydrostatic weighing to inspect the value of the gold. In the absence of a single standard, a specialist also manually inspects the jewelry before Custody Bot conducts spectral analysis.

With regards,
team GOLDMINT