Product Description from manufacturer (Willowlamp South Africa):

BIGLOVE CLOVER -2018

A four-leaf clover design in a voluptuous and sensual heart shaped chandelier form. Illuminated by 5 G4 halogen or LED lamps in suspended pyrex glass balls.
http://www.willowlamp.com/family.php?id=50 
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PRODUCT SIZE
Shade size: 700w x 900h mm
Total height: 1700mm
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polys: 2104780
verts: 1563017

In order to optimize the model the modifier TurboSmooth (Iterations: 0 Render Iters: 2) is applied to the beads. When importing * obj file you must apply a similar anti-aliasing modifier.
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Who works in the V-Ray version is lower than 3.1. Be careful the materials in the BRDF section are Microfaset GTR (GGX) if your version is older than 3.1 then the BRDF field will be empty. Choose Blinn Phong or Ward – which is preferable for you.

For Corona render it is recommended to put version no lower than 1.5 since the glossiness of materials is adjusted to the PBR.