Citrine
The yellow to orange variety of quartz. Most of it is heat-treated amethyst, and it is often mis-sold as yellow sapphire.
Natural citrine is uncommon. The great majority on the market is amethyst heated until it turns yellow, which is a stable and accepted treatment.
Colour runs from pale lemon to a deep madeira brown-orange.
In astrology it is recommended as an affordable substitute for yellow sapphire, which is honest when stated and dishonest when not.
When you are buying
If you are told citrine is yellow sapphire, walk away. If you are told it is a citrine substitute for pukhraj, that is a fair and normal offer.
Pearls with citrine
A few from the collection, from ₹3,750.

Trendy Pearl Necklace in Pearls and Rose Quartz

Pearl Necklace set in Brilliant Citrine stone pendant

Dainty Peach Pearls With Purple Garnet Beads Necklace

Radiant 4mm -8mm Graduated White Pearl Necklace With Citrine Quartz Silver Pendant

Radiant 19 Inches White Pearls Necklace With SP Purple Garnet Beads

Luxurious 23 Inches White Pearls With Purple Garnet Beads Necklace

Striking Blue Pearl Necklace With Oxidized Polki Pendant & Grey Onyx

Spectacular 6mm White Semi-Round Pearls 19Inch Necklace With Victorian Pendant
Amethyst
The purple variety of quartz. Affordable, widely available, and hard enough for everyday wear.
Yellow Sapphire
Yellow corundum. Pukhraj in Hindi, the stone of Jupiter, and the most commonly prescribed astrological gem in India.
Quartz
The most common gem mineral, covering amethyst, citrine, rose quartz, smoky quartz and clear rock crystal.
Topaz
A hard silicate gem, most often seen as blue topaz. Frequently confused with, and substituted for, yellow sapphire.