Gemstone Comment / Treatment Library

SJTA GEM LAB REFERS TO LMHC STANDARDS IN GEMSTONE COMMENT AND TREATEMENT DESCRIPTION

Untreated : No treatment is detected during analysis

Corundum

NTE : No treatment detected

TE1 / TE2 : Treatment with minor residue in fissures

TE3 / TE4 : Treatment with moderate residue in fissures

TE5 : Treatment with significant residue in fissures

C1 : Treatment with minor residue in cavity

C2 : Treatment with moderate residue in cavity

C3 : Treatment with significant residue in cavity

Heated / H(a)/ TE: Indication of heat treatment only without any residue

H(be) : Indication of heat treatment and Beryllium filling

H(b): Indication of heat treatment with moderate residue

H(c): Indication of heat treatment with significant residue ( glass / color )

Beryl

CE-Minor : Indication of clarity enhancement, usually by oil, resin, or opticon with minor residue

CE-Moderate : Indication of clarity enhancement, usually by oil, resin, or opticon with moderate residue

CE-Significant : Indication of clarity enhancement, usually by oil, resin, or opticon with significant residue

CO: Indication of surface colour coating

Dye Impregnated: Indications of color dye impregnation include concentrated color pooling in surface fractures, unnatural color concentration around pores or cavities as well as possible clarity enhancement with oil, resin or opticon

Topaz

IRR : Indication of Irradiation

CO : Indication of surface colour coating

Opal

S : Indication of smoking

Quartz

Heated : Indication of heat treatment

CO: Indication of colour coating

Jadeite

Type A : No treatment

Type B : Indication of bleaching and polymer residue

Type C : Indication of polymer residue and colour dye

Coral – Pearl

Dyed : Indication of colour dyeing