Braving the cold and hostile Libyan desert, Milad Mohammed scratches the ground to extract what he calls "manna from heaven" -- white truffles coveted as a delicacy at home and abroad.
The fungus known locally as "Terfas" is the only thing, besides some wild grass, that grows under the desert sands nurtured by the combined effect of rain and cold temperatures at night.
They have been consumed since Roman times for their delicate taste as well as their nutritious and medical properties, and are sold to Gulf countries as a luxury food item.
Mohammed harvests the white truffle as a hobby and each year before springtime he treks through the desert region of Al-Hamada al-Hamra, southwest of Tripoli, to look for them.
"I don't earn my living from this. It's a passion," says Mohammed, in his 60s, a retired civil servant from the western city of Zintan.
"It's like a therapy, a way to purify myself from the chaos of the city," he adds as he takes a drag from a cigarette outside a tent he pitched in the desert after a day's work.
"It's a beautiful place, and rough, and you feel so isolated here," says Mohammed.
For hours he wanders across the desert by foot or in his pickup truck, covering dozens of kilometres (miles) and stopping at several spots to scratch the sand with his hands or a cane in search of white truffles.
Usually they are buried deep underground.
Digging with bare hands
"There is nothing more satisfying than to use your bare hands to dig into the sand and extract these delicious truffles," says Mohammed.
"They're manna from heaven."
But searching for this white gold in the oil-rich North African country that descended into chaos after the fall of veteran dictator Moamer Kadhafi in the 2011 NATO-backed uprising is no easy task.
Libya has been gripped by unrest since the revolt, with various groups vying for control of its oil wealth and cities, while the desert has become a hornet's nest for jihadists and criminal gangs.
Unlike hunters of black truffles, who use dogs or hogs to search for the prized mushroom, Mohammed only trusts his eyes to spot the place where they grow.
According to him, white truffles -- scientifically known to provide a rich source of protein -- have health benefits and their juice is used to treat eye diseases.
But truffles are also in great demand in Gulf markets.
Buyers and sellers
Over the past few years the price per kilo of white truffles tripled to 130 dinars ($33), a merchant said, as harvesting the fungus became more difficult due to Libya's unrest and unfavourable weather conditions.
This year the harvest was good thanks to abundant rain but that meant that the cost per kilo dropped to 80 dinars.
Wholesale transactions often take place at a tent erected on a road near Zintan that leads to Al-Hamada al-Hamra.
It is there that pickers like Mohammed and Khaled Abdelwahed go to sell the truffles they found in the desert.
"We endured very cold weather but the merchant is offering us a fraction of the price," says Abdelwahed, as he tried to negotiate a good deal for the eight kilos of truffles he collected after four nights spent in the desert.
"The merchant's making a better profit than us, and all that time he keeps warm in his tent" while truffle pickers do all the hard work, he says
The buyer Khalifa al-Sahraoui, a merchant from neighbouring Algeria who travels to Libya each year for truffle season between November and March, disagrees.
"We buy the truffles and sell them to other merchants," he says.
Abdallah Miloud, another truffle merchant, says the harvest is sold to middlemen who in turn "sell them to clients abroad".
The Libyan white truffle is "of excellent quality" and "prized in Gulf countries", he adds.
There are no official figures for the export of Libyan truffles.
But according to Miloud, revenues from sales have "rescued several families" from financial hardship.
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