Ruby gemstones with certificate

Based on the provided image of the "ORIGINAL LABORATORY CERTIFICATE" from GLOBAL GEMS LABORATORY (GGL) for the gemstone, here are all the indications about it:

• Laboratory: GLOBAL GEMS LABORATORY (GGL)

• Certificate No.: GG/L4020/PS21329

Gemstone Characteristics:

• Color: Pink

• Weight (ct): 6.30 carats

• Shape & Cut: Oval

• Measurements (mm): 11.36 x 9.15 x 5.87 mm

• Optic Ch: DR (Likely stands for Dichroic or Double Refraction, common for sapphire)

• Refractive Index: 1.70 - 1.80

• Specific Gravity: 3.89 - 3.91

• Species: Corundum

• Hardness: 9.00 Mohs (This is consistent with Corundum, which includes sapphire and ruby)

• Treatments: Heating

Identification:

• The certificate clearly identifies the gemstone as a NATURAL SAPPHIRE.

Additional Information on the Certificate:

• There's a QR code labeled "Important Documents Store Safely," suggesting the certificate can be verified or more information accessed digitally.

• An "Approx. Digital Photos Magnification 1x" is noted for the image of the sapphire on the certificate.

• There's a space for an "Auth. Signature."